Blood cells,SEM

Numéro d’image : 11633937
Blood cells,SEM
Blood cells. Coloured scanning electron micrograph (SEM) of human red blood cells (erythrocytes) and a white blood cell (leucocyte,pink). Red blood cells are biconcave,giving them a large surface area for gas exchange,and highly elastic,enabling them to pass through narrow capillary vessels. The nucleus and other organelles are lost as the cells mature. The cell's interior is packed with haemoglobin,a red iron-containing pigment that has an oxygen-carrying capacity. The main function of red blood cells is to distribute oxygen to body tissues and to carry waste carbon dioxide back to the lungs. White blood cells are part of the body's immune system. They perform functions ranging from cleaning up cellular debris,to defending the body against bacteria and other pathogens
Licence : Droits gérés
Crédit: Science Photo Library / Nishinaga, Susumu
Taille de l’image : 4864 px × 3601 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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