CIRCULATORY SYSTEM PT 2 - BLOOD VESSELS Flashcards Preview

T1 PHYSIOLOGY > CIRCULATORY SYSTEM PT 2 - BLOOD VESSELS > Flashcards

Flashcards in CIRCULATORY SYSTEM PT 2 - BLOOD VESSELS Deck (17):
1

What is the function of the Arterial System?

Carries blood away from Heart to different regions of body

2

Explain the sequence of the Arterial System.

- Arteries divide into Muscular Arteries
- Muscular Arteries divide smaller into Arterioles (Resistance Vessels)
- Arterioles enter tissues, dividing into Capillaries (Exchange Vessels)
- Capillaries exchange substances between blood and tissues

3

What is the function of the Venous System?

Carry/return blood to Heart

4

Explain the sequence of the Venous System.

- Capillaries 'reunite' to form Venules
- Venules merge forming larger Veins
- Veins merge into the Vena Cavae

5

What are the 3 layers that surround the lumen of the Blood vessel? From deep to superficial.

Tunica Intima
Tunica Media
Tunica Externa

6

Describe Tunica Intima.

Inner layer - contains Endothelium and CT basement membrane

7

Describe Tunica Media.

Middle layer - contains Elastic Fibres and Smooth Muscle

8

Describe Tunica Externa/Adventitia.

Outer layer - contains Elastic and Collagen Fibres

9

Which blood vessel layer supports and anchors blood vessels to surrounding structures?

Tunica Externa/Adventitia

10

Define Vasoconstriction.

Decrease in lumen size

11

Define Vasodilation.

Increase in lumen size

12

Explain the function of the Arteries.

Stretches to accommodate blood flow
Recoils to force blood forward

13

Explain the function of the Arterioles.

Regulate blood flow by constricting and dilating vessels

14

Explain the function of the Capillaries.

Transport nutrients and waste exchange

15

Explain the function of the Venules.

Blood flow from Capillaries to Veins

16

Explain the function of Veins.

One-way valve preventing back flow of blood

17

Describe Venous Return.

Rate of blood flow back to Heart