Which of the following is a function of the heart skeleton?
A. Provides electrical insulation between the atria and ventricles.
B. Supplies support and reinforcement for the valves.
C. Provides a rigid site for cardiac muscle attachment.
D. All of the choices are functions of the heart skeleton.
D
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The alar plate of the embryo develops into the gray commissure of the spinal cord
Indicate whether this statement is true or false.
The cross-sectional view of the wings of birds and planes reveals a curved upper surface demonstrating both to be __________
Fill in the blank with the correct word.
If the alveolar is 100 mm Hg, the blood leaving the pulmonary capillaries in a normal person will have a of
a. 40 mm Hg b. 46 mm Hg c. 100 mm Hg d. 760 mm Hg e. none of these
The brachialis muscle originates on the
A. scapula and inserts on the humerus. B. radius and inserts on metacarpals. C. humerus and inserts on the ulna. D. scapula and inserts on the radius.