Eyrthrocytes - Eyrthrocytes...

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Eyrthrocytes Erythrocytes, or red blood cells (RBCs),  transport oxygen (O 2 ) and carbon  dioxide (CO 2 ) in the blood. Erythrocytes  contain the protein hemoglobin to which  both O 2 and CO 2  attach. Mature erythrocytes lack a nucleus and  most cellular organelles, thereby  maximizing the cell's volume and thus  its ability to carry hemoglobin and  transport O 2 . Erythrocytes are shaped like flattened  donuts with a depressed center (rather  than a donut hole). Their flattened  shape maximizes surface area for the 
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exchange of O 2 and CO 2  and allows  flexibility that permits their passage  through narrow capillaries. Hemoglobin  contains both a protein  portion, called globin, and nonprotein  heme groups. Globin consists of four  polypeptide chains, each of which  contains a heme group. The heme  group is a red pigment that contains a  single iron atom surrounded by a ring of 
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Eyrthrocytes - Eyrthrocytes...

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