Question

question 19
1 pts
the type of membranous tissue that lines the heart and blood vessels is the
endocardium.
endothelium.
serous pericardium.
fibrous pericardium.
question 20
1 pts
the heart has its own special covering, a loose - fitting inextensible sac called the
pericardium.
endocardium.
myocardium.
exocardium.
question 21
1 pts
microscopic vessels that carry blood from small arteries to small veins are
arterioles.
venules.
capillaries.
sinusoids.

Explanation:

• Question 19: The endothelium is a type of membranous tissue that lines the heart and blood vessels. The endocardium is the inner lining of the heart chambers, the serous pericardium is part of the pericardium (a covering of the heart), and the fibrous pericardium is the tough outer layer of the pericardium.
• Question 20: The pericardium is a loose - fitting, inextensible sac that covers the heart. The endocardium is the inner lining of the heart, the myocardium is the muscular layer of the heart, and "exocardium" is not a standard anatomical term.
• Question 21: Capillaries are microscopic vessels that carry blood from small arteries (arterioles) to small veins (venules). Arterioles carry blood away from the heart to capillaries, venules carry blood from capillaries to veins, and sinusoids are a type of capillary but are more specialized (e.g., in the liver).

Answer:

• Question 19: endothelium
• Question 20: pericardium
• Question 21: capillaries