(Q).
Q: What are the smallest type of blood vessel? Choices: - varicose veins - spider veins - arteries - capillaries A:
(A).
capillaries

(Q).
Q: In gas exchange, oxygen flows into the blood, and what flows out? Choices: - naturally dioxide - carbon monoxide - liquid dioxide - carbon dioxide A:
(A).
carbon dioxide

(Q).
Q: Each lymph organ has a different job in what system? Choices: - circulatory - respiratory - nervous - immune A:
(A).
immune