Question

the combining form systol/o- means: contracting pressure dilating clog question 34 by the definition of the combining form, we can tell that endothelium is a: cellular layer projection; point structure within blood vessel

Explanation:

• The combining form "systol/o" is related to the contraction phase in the cardiac cycle. For example, "systole" refers to the contraction of the heart muscle.
• The combining form "endo - " means within or inner, and "thelium" refers to a cellular layer. So, endothelium is a cellular layer.

Answer:

• For the first question: contracting
• For the second question: cellular layer