BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
HEMATOPOIESIS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
They have a nucleus
|
|
|
They are anucleate
|
|
|
They do not have mitochondria
|
|
|
They do not have ribosomes
|
Detailed explanation-1: -Red cells contain neither a nucleus nor RNA (ribonucleic acid, necessary for protein synthesis), so that cell division (mitosis) and production of new protein are impossible. Energy is not necessary for oxygen and carbon dioxide transport, which depends principally on the properties of hemoglobin.
Detailed explanation-2: -In addition, erythrocytes do not have a nucleus (anuclear) or any other intracellular organelles, as they are all lost during erythropoiesis. The only two major structures left are the cytoplasm which is enclosed by a surrounding cell membrane.
Detailed explanation-3: -100-120 days. its anucleate condition affect this life span by unabling it to reproduce or repair demage which was caused to it during circulation.