Fish gills, light micrograph

Fish gills, light micrograph

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Caption: Fish gills. Light micrograph of the gills of a sculpin fish (superfamily Cottoidea). Fish use gills to extract oxygen from the surrounding water. The gill consists of primary lamellae (one whole primary lamellae is seen here, centre), which have a central brachial artery (red). On each primary lamella are very thin leaf-like secondary lamellae, which have capillaries at thei centre. The secondary lamellae increase the surface area and shorten the diffusion path, which speeds up the absorption of oxygen and expulsion of carbon dioxide by the fish through its gills. Magnification: x278 when printed at 10 centimetres wide.

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Keywords: anatomical, animal, animal anatomy, biological, biology, blood vessel, brachial artery, breathing, cottoidea, fauna, fish, gaseous exchange, gill, gills, healthy, histological, histology, lamallae, light micrograph, light microscope, nature, normal, primary lamella, respiration, respiratory system, sculpin, secondary lamella, section, sectioned, zoological, zoology

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