Which of the following lymph organs has pits called crypts?
A. Bone marrow
B. Thymus
C. Lymph nodes
D. Tonsils
E. Spleen
Answer: D
Anatomy & Physiology
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Which is avascular (lacks blood vessels)?
A. Epithelial tissue B. Muscle tissue C. Nervous tissue D. Connective tissue E. All of the choices are correct.
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When blood is centrifuged and its components separate, the bottom of the tube holds the
A. electrolytes and waste products. B. buffy coat. C. monocytes. D. erythrocytes. E. platelets. F. plasma.
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The kidneys are retroperitoneal. What does that mean?
A. They are behind the parietal peritoneum. B. They are behind back muscles. C. They are behind the intestines. D. They are placed backwards in the abdominal cavity.
Anatomy & Physiology