How do you know this is a picture of a vein?
A) There is a lumen.
B) There is muscle present.
C) There is a valve.
D) It has a thick wall.

Name: How do you know this is a picture of a vein? A) There is a lumen. B) There is muscle present. C) There is a valve. D) It has a thick wall.
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Question

How do you know this is a picture of a vein? 
A) There is a lumen. 
B) There is muscle present. 
C) There is a valve. 
D) It has a thick wall.

Quizplus · Accepted Answer

The Answer of How do you know this is a picture of a vein? 
A) There is a lumen. 
B) There is muscle present. 
C) There is a valve. 
D) It has a thick wall.

How Do You Know This Is a Picture of a Vein