During the development of the respiratory system, the vasculature, muscle, and cartilage of each lung form from

A. endoderm.
B. mesoderm.
C. ectoderm.


Answer: B

Anatomy & Physiology

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Which of the following is true of the coronary arteries?

A) They branch off the pulmonary veins. B) They open and close in pulsation with the contraction and relaxation of the heart ventricles. C) Together they supply part of the heart muscle with oxygen. D) They originate at the base of the aorta and are the first branches off this vessel. E) None of the answers are correct.

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Bilirubin aids fat digestion and absorption

Indicate whether the statement is true or false

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A(n) ____ molecule is a double-stranded helical chain made up of nucleotides

a. ATP b. RNA c. DNA d. lipid

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What is the most superficial layer of the pericardial sac?

A) epicardium B) visceral pericardium C) fibrous pericardium D) parietal pericardium

Anatomy & Physiology