Question

the type of membranous tissue that lines the heart and blood vessels is the
endocardium.
endothelium.
serous pericardium.
fibrous pericardium.

question 17
1 pts
a few arteries open into other branches of the same or other arteries. this is called
arterial communication.
vessel communication.
end arteries.
arterial anastomosis.

question 18
1 pts
which types of arteries are also called conducting arteries and include the aorta?
muscular arteries
elastic arteries
metarterioles
resistance arteries

Explanation:

• Question 16: The endocardium is the inner lining of the heart and blood vessels. The endothelium lines other internal surfaces (like blood vessels but not specifically the heart’s inner lining in the context of this terminology). The serous pericardium and fibrous pericardium are outer coverings of the heart (pericardium - related to the sac around the heart, not the inner lining).
• Question 17: Arterial anastomosis is the connection (opening) of arteries into other branches of the same or other arteries. Arterial communication is too vague a term. Vessel communication is also not a standard specific term for this arterial - to - arterial connection. End arteries are arteries that do not have such connections (they end without anastomosing).
• Question 18: Elastic arteries are called conducting arteries. They have a large amount of elastic tissue in their walls, which allows them to expand as blood is ejected from the heart (like the aorta). Muscular arteries are more involved in distributing blood to different organs (distributing arteries). Metarterioles are small vessels that connect arterioles and capillaries. Resistance arteries (like arterioles) are involved in regulating blood pressure through vasoconstriction and vasodilation.

Answer:

• Question 16: endocardium
• Question 17: arterial anastomosis
• Question 18: elastic arteries