Red blood cells
A) have a large nucleus when they enter circulation.
B) do not have a nucleus when they enter circulation.
C) are the only cells to lack hemoglobin.
D) develop in the yellow marrow.
E) fit more than one of these descriptions.

Question

Quizplus · Accepted Answer

Red blood cells, also called erythrocytes, do not have a nucleus when they enter circulation. They lose their nucleus during their development in the bone marrow to make more room for hemoglobin, the protein that carries oxygen to the body's tissues.

Red Blood Cells