Which of the following is characteristic of sponges and hydras?
A) lack of an actual circulatory system
B) lack of a reproductive system
C) lack of a digestive system
D) lack of a muscle system
Correct Answer:
Verified
Q13: Where is an atrioventricular valve located?
A) where
Q14: Which of these vessels carries oxygenated blood?
A)
Q15: What is the purpose of the pulmonary
Q16: Which organ system participates in the body's
Q17: What percentage of the total blood volume
Q19: Which blood components are the smallest in
Q20: Where is erythropoietin produced?
A) in the liver
B)
Q22: Which of the following would be too
Q23: Which chamber of the heart does the
Q65: Lymph capillaries are smaller in diameter than
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