why rbc's dies in 120 days ?

Answer 1

A mature red blood cell has no cellular organells. So they have no nucleus, or mitochondria or others. So even though they are carrying all that oxygen the cell itself does not use it for its own energy needs. A cell like this is not going to have a long life, and when they get brittle they will lyse when going through the sinusoids of the speen. The iron is recycled and the rest becomes bilirubin and is made water soluble by the liver and excreted in the urine and feces.

Answer 2

Erythrocytes develop from stem cells through reticuloctyes to mature erythrocytes in about 7 days and live a total of about 120 days. The aging cells swell up to a sphere-like shape and are engulfed by phagocytes, destroyed and their materials are released into the blood. The main sites of destruction are the liver and the spleen. The heme constituent of hemoglobin is eventually excreted as bilirubin. Red blood cells have a hard life, carrying oxygen, CO2 and iron.

Answer 3

It may be because red blood cells carry oxygen. As a result of the constant exposure to high oxygen levels, the RBCs would be exposed to potentially very high levels of oxidative stress. Oxidative stress leads to damage of cellular molecules, including proteins and phospholipids in membranes. Extensive damage to these structures is partially limited by endogenous antioxidant mechanisms, but eventually, extensive damage will occur. Better to remove these damaged cells and replace them with new ones.

Hope this is helpful for you. Best wishes and good luck.

Answer 4

Why Rbc

Answer 5

every living matter can't live forever .it has to die.the scientific reason is that they do'nt have nucleus. they are the carrier of haemoglobin and it reacts out with oxygen in 120 days

Answer 6

They eventually wear out and need to be replaced... just like other cells!

Answer 7

rbc's??