Where do endocrine glands release their secretions?
A. Into a gland duct
B. Into the bloodstream
C. Onto the skin surface
D. Into the brain tissue
E. Into the digestive tract
Answer: B
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Squamous cells are column-like.
Answer the following statement true (T) or false (F)
Which of the following is not true of arteries?
a. They carry blood away from the capillaries. b. They carry blood away from the heart. c. They have thicker tunica media than do veins. d. Their innermost layer is composed of endothelium.
The systemic circulation, which supplies capillaries in the majority of the body, begins at the ________ and ends at the ________.
A) right atrium; left ventricle B) left atrium; left ventricle C) left ventricle; right atrium D) right ventricle; left atrium E) None of the answers are correct.
Identify the components of the cardiovascular system
A) heart and blood vessels B) heart and blood C) blood and blood vessels D) heart, blood, and blood vessels E) blood vessels and lymphatic vessels