Module 3: Circulatory System

Question 1

3 main components of lymph

Answer 1

Water, electrolytes, plasma protein

Question 2

Function of lymphatic capillaries

Answer 2

Collection of excess tissue fluid and protein

Question 3

3 layers of circulatory system walls and what they are made of

Answer 3

Tunica intima (endothelium) - single layer of flattened epithelial cells
Tunica media - smooth muscle and elastin
Tunica adventitia - loose connective tissue

Question 4

How do metarterioles differ from capillaries

Answer 4

Metarterioles have a layer of smooth muscle

Question 5

Histological changes that occur to arteries as they decrease in size

Answer 5

Elastic tissue decreases and smooth muscle has a greater prominence

Question 6

Layer that is relatively thick in medium and large veins

Answer 6

Tunica adventitia

Question 7

Function of vasa vasorum

Answer 7

Blood distribution to large blood vessels

Question 8

Groups of keratinized epithelial cells in the medulla of the thymus that may represent degenerative phenomenon

Answer 8

Thymic or Hassall’s corpuscles