Venous drainage

Question 1

Veins in the systemic circuit carry blood that is relatively oxygen-poor, except for the pulmonary veins

Question 2

Venules > medium sized veins > large veins

Question 3

How do veins and arteries differ in structural ways?

Answer 3

• Luman of vein is larger
• In a vein, tunica externa is thicker
• have less elastin in their walls
• wall is thinner

Question 4

One _______ artery leaves the heart ______ from the LV
3 major veins enter the ______ of the heart:

Answer 4

systemic
(aorta)
RA

• SVC
• IVC
• Coronary sinus

Question 5

Veins are found

Answer 5

deep, with corresponding arteries and just under the skin, with no arteries

Question 6

Commonly 2 or more parallel veins drain a body region rather __________
In some regions, many veins _______________

Answer 6

than a singular, larger vein.
anastomose to form a venous plexus

Question 7

the brain and digestive tract have unusual patterns of venous drainage
Veins of the brain:

Venous blood returning from the digestive organs enters

Answer 7

drain into the dural venous sinuses

a special sub- circulation = hepatic portal system