40 to 50
red blood cells are replaced ever 120 days, so therefore are replaced 3 times a year
Yes, red blood cells are recycled every 100-120 days.
Are replaced every few days
The human blood cell on average lives for apx. 120 days. once it dies it has to be replaced.
120 days
Blood cells are made in the bone marrow or stem cells of your body. The stem cells become red blood cells, white blood cells and platelets. Red blood cells are replaced every 120 days, platelets every 6-7 days and white blood cells everyday.
The human skin is not replaced every 40 days. It is believed that the skin is replaced on average every 35 days.
I think red blood cells live about 21 days.
The replacement of red blood cells primarily depends on the rate of production in the bone marrow and the lifespan of the cells. Red blood cells normally have a lifespan of about 120 days, after which they are removed from circulation and replaced with new ones. The body closely regulates the production of red blood cells to maintain a stable level of oxygen-carrying capacity in the blood.
Hormones secreted by the body stimulate the bone marrow to produce red blood cells. People on hemodialysis(due to kidney failure) with a low blood count take a synthetic(man- made) hormone called Epogen or Procrit to help stimulate blood cell production. It's very expensive, but since it came into use, it drastically reduced the need for blood transfusions in the dialysis clinic. A healthy person can produce enough hormone to stimulate red blood cell production & replace the blood lost, unless it's massive volume. I
Well theres more red blood cells than white, and the life span of a red blood cells is about 120 days and yes billions of rbcs are destroyed and produced each day.. its about 2 million per second so yeah 10 million every 5 seconds are destroyed, but 2 million are also produced.. pretty cool huh?
Well, you actually have mucus lining your stomach, but that lining is replaced every couple of weeks.