The earlike extension of the atrium is the
A) ventricle.
B) coronary sinus.
C) coronary sulcus.
D) auricle.
E) atricle.
Answer: D
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Fill in the blank(s) with the appropriate word(s).
The trophoblast is located at the
A. periphery of the blastocyst. B. center of the blastocyst. C. periphery of the morula. D. center of the morula. E. center of the embryoblast.
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A) surface mucous cells: produce mucus B) parietal cells: produce hydrochloric acid C) chief cells: produce intrinsic factor D) endocrine cells: produce regulatory hormones
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A. Smooth muscle B. Cardiac muscle C. Skeletal muscle D. Both smooth and cardiac muscles.