Arteries. Capillaries and Veins

Question 1

Arteries

Answer 1

Moves blood leaving the heart
Provide oxygen and nutrients via thin-walled capillaries to organs and tissues
Goes from elastic arteries -> to muscular arteries -> arterioles -> capillaries

Question 2

Capillaries

Answer 2

Remove carbon dioxide and metabolic wastes produced in the tissues
Capillaries -> Venules -> veins

Question 3

Veins

Answer 3

Returns blood to the heart

Question 4

Walls of Artery and veins

Answer 4

Tunic intima
Tunica Media
Tunica Adventitia

Question 5

Tunic Intima

Answer 5

Encloses the lumen of the vessel.

Consists of simple squamous epithelium (Endothelium) with an adjacent layer of loose connective tissue

Question 6

Tunica Media

Answer 6

Middle coat of elastic fibers and smooth muscle (Thicker in arteries)
Arteries close to the heart have more elastic fibers
Arteries farther away have more smooth muscle

Question 7

Tunica Adventitia

Answer 7

The outermost layer
Sheath of loose connective tissue with elastic collagen fibers and some strands of smooth muscle
Anchor the vessels to the adjacent tissue

Question 8

Vasa Vasorum

Answer 8

When the tunica media is too thick that it will not permit simple diffusion of oxygen and nutrients to the smooth muscle, these piece the tunica media to do this.

Question 9

Valves

Answer 9

Venules and veins have these

Ensure the one-way flow of blood back to the heart

Question 10

Varicose veins

Answer 10

Failure of the vales will permit blood to back-up in the limbs

Question 11

Arteriosclerosis

Answer 11

Hardening of the arteries

Increases blood pressure, ONLY in arteries

Question 12

Atherosclerosis

Answer 12

Formation of plaque composed of cholesterol, calcium and connective tissue deposited btwn the tunica intima and tunica media of arteries

Question 13

Arteries (Lab notes)

Answer 13

Large and muscular
Deal with a lot of pressure
Very elastic
Closest to the heart at the thickest and most flexible