Circulation

Question 1

What are 3 types of arteries?

Answer 1

• elastic arteries
• muscular arteries
• arterioles

Question 2

Arteries carry blood ____ ____ the heart.

Answer 2

away from

Question 3

Veins carry carry blood _______ the heart.

Answer 3

toward

Question 4

Capillaries are thin enough to allow for _____ _____.

Answer 4

Gas exchange

Question 5

Venules merge to form ____.

Answer 5

veins

Question 6

What are the 3 layers of arteries and veins?

Answer 6

Tunica interna (intima)
Tunica media
Tunica externa (adventitia)

Question 7

Whats another name for the tunica interna?

Answer 7

intima

Question 8

What’s another name for the tunica externa?

Answer 8

adventitia

Question 9

Which is the thickest layer in the arteries?

Answer 9

tunica media

Question 10

Describe the tunica intima.

Answer 10

Made up of…

• simple squamous epithelium (aka endothelium)
• basement membrane
• internal elastic lamina

Question 11

Describe the tunica media.

Answer 11

Made up of…

• circular smooth muscle
• external elastic lamina

Question 12

Describe the tunica externa.

Answer 12

Made up of…

- elastic and collagen fibers

Question 13

What is the thickest layer in veins?

Answer 13

the adventitia