Question

in adults, red blood cells are made in one place, spend most of their lifespan in another, and most are finally destroyed in yet another place. which choice lists these locations in the correct chronological order?
multiple choice
spleen; blood vessels; bone marrow
spleen; blood vessels; spleen
bone marrow; spleen; blood vessels
blood vessels; spleen; bone marrow
bone marrow; blood vessels; spleen

Explanation:

• Red blood cells (RBCs) are produced in the bone marrow through erythropoiesis.
• After production, they enter the bloodstream (blood vessels) and circulate, delivering oxygen to tissues.
• Old or damaged RBCs are removed from circulation and destroyed mainly in the spleen (also in the liver to some extent).

Answer:

Bone marrow; blood vessels; spleen