Why white blood cells have flexible cell membranes?

Answer 1

It is so they can easily leave the blood vessels. Bacteria and other pathogens can exist anywhere in the body, so the WBC that are tasked with killing these pathogens need the ability to leave the vascular system. If they could not, they would only be able to clean up pathogens within the bloodvessels themselves, and not in surrounding tissue.

The walls of arteries and veins contain little holes through which WBCs can escape due to their ability to flexibly squeeze themselves through. Red blood cells cannot do this, and so they stay inside.

Answer 2

So that they can squeeze through the tiny capillaries to reach the cells.
the red blood cells change theis shape and become enucleated , round inocular in shape in order to increase their surface area so that they can absorb more oxygen and exchange it wid carbon dioxide through the RBC pigment haemoglobin at the tissue cells.

Answer 3

The special shape of the red blood cell is nature's best compromise

between the need for high surface area, and the need to slip easily

through blood vessels.

Since blood cells need to absorb and release gases readily, it is beneficial to have a high surface area. (or the maximum surface area to volume ration). A sphere has the minimum

surface area, while a flat jagged surface has the highest surface area to

volume. However, a totally flat, or jagged structure would not fit easily

through narrow vessels without getting hung up or stuck (for example,

the difficulty that sickle shaped cells have getting through vessels in the disease sickle cell anemia), while a perfect sphere would move the easiest and have the least resistance.

The best balance between these two competing properties is the

flattened sphere, i.e. the well known blood cell shape.

Answer 4

White blood cells need to be able to move through tissues and squeeze through narrow spaces to reach sites of infection or inflammation. Their flexible cell membranes allow them to change shape and navigate through the body to perform their immune functions effectively.

Answer 5

They are flexible because they form a sickle shape.

Answer 6

Rigid