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Bacteria and yeast. Coloured scanning electron micrograph (SEM) of bacteria (blue) and yeast. In many environments, bacteria and fungi coexist and interact. Furthermore, these bacterial-fungal interactions often have important ramifications for the biology of the interacting partners. In humans this coexistence in the human microbiome in health and during disease is of major research interest. Mag
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Dental plaque. Coloured scanning electron micrograph (SEM) of dental plaque. Plaque consists of a film of bacteria embedded in a glycoprotein matrix. The matrix is formed from bacterial secretions and saliva. Magnification: x10,000 when printed at 10 centimetres wide.
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Mycobacterium smegmatis bacteria. Coloured scanning electron micrograph (SEM) of Mycobacterium smegmatis bacteria. These bacteria feed on dead or decaying material. They are found in soil or in smegma (secretions from genital glands of animals). Most Mycobacteria are harmless, but a few are pathogenic, such as Mycobacterium tuberculosis, the cause of the lung disease tuberculosis. M. smegmatis is
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of Streptomyces coelicoflavus bacteria (strands) and chains of Streptococcus bacteria (round). Streptomyces coelicoflavus is a filamentous soil bacterium. Streptococcus bacteria are an example of cocci (round bacteria) that form chains.
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Bone tissue. Coloured scanning electron micrograph (SEM) of cancellous (spongy) bone. Bone tissue can be either cortical (compact) or cancellous. Cortical bone usually makes up the exterior of the bone, while cancellous bone is found in the interior. Cancellous bone is characterised by a honeycomb arrangement, comprising a network of trabeculae (rod-shaped tissue). These structures provide support
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Fractured tendon. Coloured scanning electron micrograph (SEM) of a fractured flexor tendon of the finger showing the collagen fibres. The parallel arrangement of the fibres make the tendon inelastic but flexible. Tendons attach muscle to bone. Magnification: x5000 when printed at 10 centimetres wide.
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of Streptomyces coelicoflavus bacteria (strands) and chains of Streptococcus bacteria (round). Streptomyces coelicoflavus is a filamentous soil bacterium. Streptococcus bacteria are an example of cocci (round bacteria) that form chains.
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Anther. Coloured scanning electron micrograph (SEM) of a wood anemone (Anemone nemerosa) anther (male reproductive part) covered in pollen. Magnification: x65 when printed at 10 centimetres wide.
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Activated T lymphocytes and red blood cells (RBCs). Coloured scanning electron micrograph (SEM) of activated T lymphocytes and RBCs from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus. T lymphocytes recognise a specific site on the surface of pathogens or foreign objects (antigens), bind to it, a
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Dental plaque. Coloured scanning electron micrograph (SEM) of dental plaque (pink) on a tooth. Plaque consists of a film of bacteria embedded in a glycoprotein matrix. The matrix is formed from bacterial secretions and saliva. Magnification: x300 when printed at 10 centimetres wide.
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Bone tissue. Coloured scanning electron micrograph (SEM) of cancellous (spongy) bone. Bone tissue can be either cortical (compact) or cancellous. Cortical bone usually makes up the exterior of the bone, while cancellous bone is found in the interior. Cancellous bone is characterised by a honeycomb arrangement, comprising a network of trabeculae (rod-shaped tissue). These structures provide support
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of Streptomyces coelicoflavus bacteria (strands) and chains of Streptococcus bacteria (round). Streptomyces coelicoflavus is a filamentous soil bacterium. Streptococcus bacteria are an example of cocci (round bacteria) that form chains.
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of strands of Streptomyces coelicoflavus bacteria. Streptomyces coelicoflavus is a filamentous soil bacterium.
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Licmorpha. Coloured scanning electron micrograph (SEM) of colonies of the freshwater diatom Licmorpha sp. Magnification: x500 when printed at 10 centimetres wide.
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Intestinal villi. Coloured scanning micrograph (SEM) of villi from the lining of the jejunum (part of the small intestine). Magnification: X30 when printed at 10 centimetres wide.
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March fly. Scanning electron micrograph (SEM) of a female march fly (family Bibionidae). A member of a family of stout insects in the fly order, Diptera, that are commonly seen around flowers during spring and early summer. The larvae feed on the roots of plants and on decaying vegetation and may occasionally become plant pests. March flies show sexual dimorphism or visual difference between the s
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Trachea mucous membrane. Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue. The upper epithelial surface is covered in a mixture of secretory cells (brown) and ciliated cells (pink). The tall columnar epithelium (green) is exposed with some nuclei visible, and the underlying connective tiss
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Wasp eye. Coloured scanning electron micrograph (SEM) of numerous lenses, called ommatidia, that make up the compound eye of a wasp (Suborder Apocrita). A compound eye is not very good at distinguishing detail, but it does enable the detection of tiny movements. Magnification: x200 when printed 10 centimetres wide.
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Bacteria and yeast. Coloured scanning electron micrograph (SEM) of bacteria (red) and yeast. In many environments, bacteria and fungi coexist and interact. Furthermore, these bacterial-fungal interactions often have important ramifications for the biology of the interacting partners. In humans this coexistence in the human microbiome in health and during disease is of major research interest. Magn
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Tongue bacteria. Coloured scanning electron micrograph (SEM) of bacteria on the surface of a human tongue. Large numbers of bacteria can form a visible layer on the surface of the tongue. The mouth contains a large number of bacteria, most of which are harmless or even beneficial. However, some bacteria can cause throat infections or cause the formation of plaque deposits on the teeth, which may l
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Radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton. Magnification: x400 at 10 centimetres wide.
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Lychnocanoma radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a Lychnocanoma sp. radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton. Magnification: x200 at 10 centimetres wide.
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Cat flea. Coloured scanning electron micrograph (SEM) of the head of a cat flea (Ctenocephalides felis). Magnification: x130 when printed at 10 centimetres wide.
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Coloured scanning electron micrograph (SEM) of rod-shaped (bacillus) bacteria. The tubes connecting the bacteria are pili, which are used to transfer genetic material between bacteria in a process known as conjunction.
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Asparagus beetle, coloured scanning electron micrograph (SEM). The asparagus beetle (Crioceris asparagi) is a pest of asparagus crops (Asparagus officinalis) in Europe and the USA. The beetle feeds and lays its eggs upon the asparagus spears so destroying the crop. Magnification: x15 when printed at 10 centimetres tall.
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Leukaemia blood cells. Coloured scanning electron micrograph (SEM) of B lymphocyte white blood cells (round) from a patient with leukaemia. Magnification: x5000 when printed 10 centimetres wide.
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Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells. They circulate in the blood and also remove carbon dioxide to the lungs for exhalation. Their red colour is due to the oxygen-carrying protein haemoglobin. Red blood cells, the most abundant cell i
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Embryonic stem cells (ESCs), coloured scanning electron micrograph (SEM). ESCs are pluripotent, that is they are able to differentiate into any cell type. The type of cell they mature into depends upon the biochemical signals received by the immature cells. This ability makes ESCs a potential source of cells to repair damaged tissue in diseases such as Parkinson's and insulin-dependent diabetes. H
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Moth proboscis. Coloured scanning electron micrograph (SEM) of the coiled proboscis of a moth (order Lepidoptera). The proboscis is an elongated part of the mouth, used for sucking up nectar and other liquids. Sensory taste sensilla (brown) occur at its tip. Magnification: x35 when printed at 10 centimetres wide.
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Radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton. Magnification: x400 at 10 centimetres wide.
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Female copepod. Coloured scanning electron micrograph (SEM) of a female copepod with eggs. Copepods are microscopic aquatic crustacea. Magnification: x200 when printed at 10 centimetres wide.
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Bone tissue. Coloured scanning electron micrograph (SEM) of cancellous (spongy) bone. This tissue, found in the interior of bones, is characterised by a honeycomb arrangement of trabeculae (columns) and spaces. This honeycomb structure provides support and strength to the bone. Magnification: x 15 when printed 10 centimetres wide.
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Asparagus beetle, coloured scanning electron micrograph (SEM). The asparagus beetle (Crioceris asparagi) is a pest of asparagus crops (Asparagus officinalis) in Europe and the USA. The beetle feeds and lays its eggs upon the asparagus spears so destroying the crop. Magnification: x15 when printed at 10 centimetres tall.
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Sucrose crystals, coloured scanning electron micrograph (SEM). Magnification: x1250 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, green). Magnification: x6,600 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, red). Magnification: x6,600 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes). Magnification: x2,400 when printed at 10 centimetres wide.
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Fallopian tube. Coloured scanning electron micrograph (SEM) of the surface of a fallopian tube, showing non-ciliated (green) and ciliated (orange) cells. Microvilli (small protrusions) cover the surface of the secretory, non-ciliated cells. Magnification: x1200 when printed at 10 centimetres wide.
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Sarcoptic mange mites, coloured scanning electron micrograph (SEM). These burrowing mites cause the skin disease scabies. Magnification: x30 when printed at 10 centimetres wide.
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Rabbit flea (Spilopsyllus cuniculi), coloured scanning electron micrograph (SEM). The two structures protruding from the centre of the flea's head are sensory palps. Below these are the mouthparts, which pierce the skin to enable the flea to suck the blood of its host. Magnification: x200 when printed at 10 centimetres wide.
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White blood cells. Coloured scanning electron micrograph (SEM) of white blood cells (leucocytes) and a platelet (thrombocyte, orange). Magnification: x6,600 when printed at 10 centimetres wide.
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Inner ear hair cells. Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear. The crescent-shaped arrangements of hairs across top are the stereocilia. Each crescent lies atop a single cell. Magnification: x1000 when printed at 10 centimetres wide.
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Calcareous phytoplankton. Coloured scanning electron micrograph (SEM) of the external mineralised structures (coccospheres) of small marine algal organisms called coccolithophores. The coccospheres are made up of coccoliths, which are individual plates of calcite crystals.
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Ruptured venule. Coloured scanning electron micrograph (SEM) of a ruptured venule running through fatty tissue. Stacked red blood cells (rouleaux formation) and white blood cells are seen within the venule. Magnification: x1050 when printed at 10 centimetres wide.
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of strands of Streptomyces coelicoflavus bacteria. Streptomyces coelicoflavus is a filamentous soil bacterium.
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Rhabdonema. Coloured scanning electron micrograph (SEM) of a colony of the marine diatom Rhabdonema sp. Magnification: x500 when printed at 10 centimetres wide.
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Streptococcus bacteria. Coloured scanning electron micrograph (SEM) of chains of Streptococcus bacteria with Streptomyces coelicoflavus bacteria in the background. Streptococcus bacteria are an example of cocci (round bacteria) that form chains. There are over 50 species of Streptococcus bacteria, some of which cause disease in humans. Streptomyces coelicoflavus is a filamentous soil bacterium.
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Skin cell. Coloured scanning electron micrograph (SEM) of a squamous cell on the surface of the skin. This is a flat, keratinised, dead cell. Squamous cells are continuously sloughed off and replaced with new cells from below. Magnification: x4000 when printed at 10 centimetres wide.
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Diatom, coloured scanning electron micrograph (SEM). Diatoms are a major group of eukaryotic algae, and are one of the most common types of phytoplankton. A characteristic feature of diatom cells is that they are encased within a unique cell wall made of silica (hydrated silicon dioxide) called a frustule. Magnification: x800 when printed at 10 centimetres wide.
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Inner ear hair cells. Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear. The crescent-shaped arrangements of hairs across top are the stereocilia. Each crescent lies atop a single cell. Magnification: x1000 when printed at 10 centimetres wide.
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Streptomyces coelicoflavus bacteria. Coloured scanning electron micrograph (SEM) of Streptomyces coelicoflavus bacteria (strands) and chains of Streptococcus bacteria (round). Streptomyces coelicoflavus is a filamentous soil bacterium. Streptococcus bacteria are an example of cocci (round bacteria) that form chains.
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Coloured scanning electron micrograph (SEM) of breast cancer cells growing in culture. These are from the MCF-7 cell line. Magnification: x255 when printed at 10 centimetres wide.
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Water bear. Coloured scanning electron micrograph (SEM) of a water bear (Macrobiotus sp.), or tardigrade. This tiny invertebrate lives in aquatic and semi-aquatic habitats such as lichen and damp moss. Magnification: x250 when printed at 10 centimetres wide.
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Blood clot. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocytes, red) clumped together with fibrin (brown) to form a blood clot. Magnification: x5000 when printed 10 centimetres wide.
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Activated human macrophage, coloured scanning electron micrograph (SEM). Magnification: x2,700 when printed at 10 centimetres wide.
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Intestinal villi. Coloured scanning micrograph (SEM) of villi from the lining of the jejunum (part of the small intestine). Magnification: X30 when printed at 10 centimetres wide.
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Scorpion fly (Panorpa communis) foot, coloured scanning electron micrograph (SEM). The claws are used to grip rough surfaces. The hairy adhesive pads, or pulvilli (beneath the claws), allow the fly to cling to smooth surfaces. Magnification: x100 when printed at 10 centimetres wide.
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Skimmia sp. pollen grain, coloured scanning electron micrograph (SEM). Magnification: x2000 when printed at 10 centimetres wide.
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Pancreatic cancer cells. Coloured scanning electron micrograph (SEM) of pancreatic cancer cells. The cells are joined by a cytoplasmic bridge. The irregular shape of the cells, the cellular projections and blebs (nodules) are typical of cancer cells. Pancreatic cancer often causes no symptoms until it is well established and untreatable.
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Coloured scanning electron micrograph (SEM) of breast cancer cells growing in culture. These are from the MCF-7 cell line. Magnification: x800 when printed at 10 centimetres wide.
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Bone cancer cell. Coloured scanning electron micrograph of an osteosarcoma cancer cell. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells. It is the most common histological form of primary bone cancer. Magnification: x2000 when printed at 10 centimetres wide.
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Flowering currant (Ribes sanguineum) pollen grains, coloured scanning electron micrograph (SEM). Magnification: x2000 when printed at 10 centimetres wide.
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