A) engine.
B) electrical system.
C) cooling system.
D) transmission system.

A) Fibrinogen is the connective tissue in the wall of an artery.
B) Fibrinogen is the protein portion of the hemoglobin molecule.
C) Fibrinogen is a transport lipoprotein that carries cholesterol.
D) Fibrinogen is a lipid found in platelets.
E) Fibrinogen is a plasma protein involved in clotting.

A) Bone marrow produces red blood cells.
B) Bone marrow helps keep the blood moving through the body.
C) Bone marrow produces chemicals that help carry carbon dioxide in the blood.
D) Bone marrow breaks down old blood cells.