Circulatory System Flashcards Preview

Anatomy > Circulatory System > Flashcards

Flashcards in Circulatory System Deck (24):
1

Car coolant analogy

Both systems have a circulating fluid, a pump, and flexible tubing

2

What are blood vessels

Tubular structures that carry blood

3

What are the types of blood vessels

Arteries, capillaries, and veins

4

Arteries

Carry oxygenated blood from heart to parts of the body

5

Arterioles

Smaller, branched arteries that provide blood for the capillaries

6

Two types of arteries

Elastic and muscular

7

What is unique about capillaries?

Only blood vessel whose walls permit exchange with outside fluid

8

What role do venues play and veins have in circulatory system?

Carry deoxygenated blood from body to heart

9

Three distinct layers of arteries and veins

Tunica interna- innermost
Tunica media- middle
Tunica externa- outermost

10

What are the two types of blood pressure

Arterial- pressure going out to body
Venous- pressure going back to heart

11

What three factors affect blood resistance in the vessels

Vascular resistance, viscosity, turbulence

12

What are the three general patterns of blood vessels

Distribution identical, single vessel undergoes name changes, one vessel branches out

13

Jugular

Returns blood from cranial cavity

14

Inferior vena cava

Collects blood from organs inferior to diaphragm

15

Affect of lying down on blood pressure

Decreased because there is no gravity

16

Affect of cold temperature in blood pressure

Increase because blood vessels constrict

17

Caffeine affect on blood pressure

Increase because it constricts blood vessels

18

Four chambers of the heart

Two atria and two ventricles

19

Four valves of heart

Pulmonary, aortic, mitral (bicuspid), tricuspid

20

Blood leaves the left ventricle by passing through the

Bicuspid valve

21

Three layers of the heart

Epicardium- outer
Myocardium- muscular wall
Endocardium- attached to blood vessels

22

Steps of heart conduction system

Starts in sinoatrial node, electrical signal signs to atrioventricular node, impulse travels to AV bundle, then purkinje fibers.

23

Another name for hearts natural pacemakers

The sinoatrial node

24

Function of circulatory system

Responsible for the flow of blood, nutrients, hormones, and respiratory gases