In science we have a lab...and I dont really know the answers to these questions.....(1)Why can't red blood cells reproduce...I put because they dont have a nucleus...(2)What kind of cell(between red,white, andplatelets) are the most numerous?....i put white blood cells....and thats it.....you dont need to answer both of them...
2006-10-08 06:28:26 · 3 answers · asked by jgbaek 4 in Science & Mathematics ➔ Other - Science
You are right about the first question, but to be more specific, it's because they do not have DNA. As for the second question, the most numerous is definately Red Blood Cells.
2006-10-08 06:37:44 · answer #1 · answered by sciteach9 2 · 1⤊ 0⤋
This should help! You were right.
White blood cells are cells which form a component of the blood. They are produced in the bone marrow and help to defend the body against infectious disease and foreign materials as part of the immune system.
A scanning electron microscope (SEM) image of normal circulating human blood. One can see red blood cells, several knobby white blood cells including lymphocytes, a monocyte, a neutrophil, and many small disc-shaped platelets.There are normally between 4x109 and 11x109 white blood cells in a litre of healthy adult blood — about 7,000 to 25,000 white blood cells per drop. In conditions such as leukemia this may rise to as many as 50,000 white blood cells in a single drop of blood. As well as in the blood, white cells are also found in large numbers in the lymphatic system, the spleen, and in other body tissues.
Red blood cells are the most common type of blood cell and are the vertebrate body's principal means of delivering oxygen from the lungs or gills to body tissues via the blood.
Red blood cells are also known as RBCs or erythrocytes (from Greek erythros for "red" and kytos for "hollow", with cyte nowadays translated as "cell"). A schistocyte is a red blood cell undergoing fragmentation, or a fragmented part of a red blood cell.
There are about 4,000–11,000 white blood cells and about 150,000–400,000 platelets in a cubic millimeter of human blood. The red blood cells store collectively about 3.5 grams of iron, more than five times the iron stored by all the other tissues combined.
As a result of the lack of nucleus and organelles, the cells cannot produce new structural or repair proteins or enzymes and their lifespan is limited.
2006-10-08 13:50:52 · answer #2 · answered by Still_21_nheart 4 · 1⤊ 0⤋
Your right regarding r.b.c reproduction; however, r.b.c's are most numerous not w.b.c or platelets. Please remember that w.b.c are immune related.
I hope this helps!!
2006-10-08 13:40:17 · answer #3 · answered by Trish 2 · 1⤊ 0⤋