How are red blood cells able to move through narrow vessels to carry oxygen throughout a multicellular organism? (1 point)

Responses

They are small because their organelles are smaller than those of other cells.
They are small because their organelles are smaller than those of other cells.

They are long and thin with a tail-like end.
They are long and thin with a tail-like end.

They are flexible because they lack a plasma membrane.
They are flexible because they lack a plasma membrane.

They are small because they lack a nucleus.

1 answer

The correct response is:

They are small because they lack a nucleus.

Red blood cells (RBCs) are biconcave discs that lack a nucleus, allowing them to be smaller and more flexible. This flexibility enables them to squeeze through narrow capillaries, facilitating the efficient transport of oxygen throughout the body.