Histo Vascular

Question 1

Answer 1

Large elastic artery - notice the huge tunica media with smooth muscles

Question 2

What are these wavy structures in the large elastic artery

Answer 2

These are elastic lamellae produced by fibroblast and smooth muscle cells, both are found in the tunica media of the large elastic artery

Question 3

Know where the internal and external elastic membrane is

Answer 3

Internal is towards the tunica intima (up) and external is towards the tunica adventitia

Question 4

Answer 4

Aorta, mallory stain

Question 5

Answer 5

Medium artery, mallory stain - notice the thin layer of tunica media.

Also note that we can clearly differentiate between all three layers

Question 6

What does the single wavy line in the attached slide signifiy

Answer 6

Beginning of the tunica intima

Question 7

What does tunica adventitia has in medium artery

Answer 7

It has an abundant collagen and elastin

Question 8

Answer 8

Medium vein - notice al three layers are also visible here

Tunica adventitia has mostly collagen

Question 9

Answer 9

This is large vein. One of the unusual things about large vein is that it has smooth muscles in tunica media and tunica adventitia that can be seen in the slide.

The smooth muscles appear to be arranged in different planes, one of them is coming out of the plane whereas in the tunica media they are parallel to the plain

Question 10

What is the function of pericytes as illustrated in the video for capillaries

Answer 10

They are important in angiogenesis

Question 11

How do you identify lymphatics

Answer 11

They have venule like structures with few smooth muscles, they have valves and are missing RBCs

Question 12

What does valves have

Answer 12

They have intima and connective tissue, there are no smooth muscles hence there will be no tunica media, there is only tunica intima