Most cells of the body reproduce by mitosis (a form of cellular division). Why don't erythrocytes reproduce by mitosis?
2007-03-21 16:27:28 · 7 answers · asked by Sam 2 in Science & Mathematics ➔ Biology
Erythrocytes have no nuclei and so cannot undergo mitosis. RBCs lose their nuclei before they are released into the blood stream
2007-03-21 16:40:09 · answer #1 · answered by brisko389 3 · 1⤊ 0⤋
Actually, they do. From stem cells in the bone marrow and spleen. These stem cells divide by mitosis and are converted to more and more differentiated red blood cell precursors until you get the un-nucleated red blood cell. Then the RBCs die after approximately 21 days in the general circulation. These red blood cell presursors are (in order of undifferentiated to differentiated) rubriblast, pro-rubricyte, rubricyte, metarubricyte and reticulocyte. The reticulocytes still have a small nucleus and are seen in th peripheral circulation. Other precursor cells are not seen in the peripheral circulation unless there is some disease.
2007-03-21 23:43:55 · answer #2 · answered by misoma5 7 · 0⤊ 0⤋
they can reproduce by mitosis but before they reach the Metarubricyte stage where the nucleus is extruded in later period of this stage, so after this stage cell no longer can undergo mitosis
2007-03-21 23:41:31 · answer #3 · answered by Anonymous · 0⤊ 0⤋
they do not comtain dna as ono nucleus their job is to carry oxygen.
2007-03-22 04:59:41 · answer #4 · answered by cyan03 2 · 0⤊ 0⤋
Just another way for God to prove evolution is stupid.
2007-03-21 23:49:24 · answer #5 · answered by fastest73torino 2 · 0⤊ 0⤋
erythrocytes don't have DNA.
2007-03-21 23:31:08 · answer #6 · answered by colravi 2 · 1⤊ 0⤋
they don't have a nucleus
2007-03-22 00:28:00 · answer #7 · answered by ♂ ♫ Timberwolf 7 · 0⤊ 0⤋