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Oxygen-rich blood returning from the lungs enters the left atrium through two right and two left pulmonary veins.
Q10: The lumbar and intestinal trunks unite at
Q12: In lymph nodes, follicles are always located<br>A)
Q34: A drop of blood returning to the
Q45: The ability to vary the pitch of
Q46: A bubo is<br>A) an infected lymph node
Q50: Along with leukocytes, these contribute less than
Q55: The cerebral arterial circle forms a loop
Q94: The adrenal medulla is comprised of modified
Q100: Which of the following hormones is secreted
Q106: Lymphocytes attack antigens mostly in lymphoid organs