about two weeks
well you dont want your blood cells to big or to small the red blood cells are what keeps your blood flowing the correct way so yes red blood cells are life threatening.
Red blood cells carry oxygen through your body.
Red blood cells don't have nuliets however white blood cells do. Red blood cells can have an average life-span of 120 days while white blood cells do not have an average life span. Also, white blood cells are larger than red blood cells.
The spleen identifies "old" erythrocytes (RBCs) and destroys them. The life of an RBC is around 120 days.
this mostly happens with multi-cellular organisms and red blood cells. Red blood cells lose their nucleus.
Respiration
Red blood cells contain hemoglobin. These cells are also known as erythrocytes.
As the name says, red blood cells are found in the blood. If there is blood there, there is red blood cells.
They lose their nucelous.
The cells in the bloodstream include red blood cells, white blood cells, and platelets. Red blood cells carry oxygen to tissues, white blood cells help fight infections, and platelets aid in blood clotting.
red blood cells carry oxygen around the body and provide us with the oxygen then say the red blood cell is O the circumference is blood and the empty area in the middle is oxygen they last for i think about 3 months then die then go to the liver and get neutralised and the liver makes another. so red blood cells are critical for life
Red blood cells (also called erythrocytes)