Question

the cellular components of blood that transport oxygen are:
a leukocytes
b erythrocytes
c thrombocytes
d chondrocytes
e osteocytes
question 22
a blood vessel that carries blood toward the heart is:
a an artery.
b a vein.
c a ventricle.
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Explanation:

For the first question: Erythrocytes (red blood cells) contain hemoglobin, which binds to oxygen for transport. Leukocytes are white blood cells (immune function), thrombocytes are platelets (clotting), chondrocytes are cartilage cells, and osteocytes are bone cells—none transport oxygen.
For the second question: Veins carry blood toward the heart. Arteries carry blood away from the heart, ventricles are heart chambers (not vessels), and the incomplete option is irrelevant.

Answer:

1. B. Erythrocytes
2. B. a vein.