Arteries. Capillaries and Veins Flashcards Preview

Anatomy Exam 1 > Arteries. Capillaries and Veins > Flashcards

Flashcards in Arteries. Capillaries and Veins Deck (13):
1

Arteries

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

2

Capillaries

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

3

Veins

Returns blood to the heart

4

Walls of Artery and veins

Tunic intima
Tunica Media
Tunica Adventitia

5

Tunic Intima

Encloses the lumen of the vessel.
Consists of simple squamous epithelium (Endothelium) with an adjacent layer of loose connective tissue

6

Tunica Media

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

7

Tunica Adventitia

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

8

Vasa Vasorum

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.

9

Valves

Venules and veins have these
Ensure the one-way flow of blood back to the heart

10

Varicose veins

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

11

Arteriosclerosis

Hardening of the arteries
Increases blood pressure, ONLY in arteries

12

Atherosclerosis

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

13

Arteries (Lab notes)

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