Question

question 30
1 pts
figure 20.1
use the diagram above to answer the following questions.
identify the letter that is indicating the lumen.
a
b
c
d
e

Explanation:

The lumen is the hollow interior of a tubular structure. In the context of blood vessels (which this diagram likely represents), the lumen is the space through which blood flows. Looking at the diagram, the arrow in the left - hand structure points to the hollow central part, which is labeled as A.

Answer:

A.