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Biology 12: Circulatory System > Across > Flashcards

Flashcards in Across Deck (24)
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1

One of the layers found in arteries which allows them to construct or dilate

Smooth muscle

2

Larger blood vessels which carry blood back to heart

Veins

3

Main part of heart (mostly muscle)

Myocardium

4

The chamber of the heart which receives blood from rest of body

Right atrium

5

Smaller vessels that carry blood away from the heart

Arterioles

6

Receives blood returning from the lungs

Left atrium

7

Large vessels that carry blood away from heart

Arteries

8

The sound made by the heart valves during atrial contraction

Lub

9

Oxygenated blood is found on which side of the heart

Left

10

Contractions in these muscles helps to push blood through the veins and back to heart

Skeletal

11

Receives a signal from the SA node and initiates ventricular contraction

AV node

12

The heart is able to beat without control of the brain- therefore, heartbeat is said to be

Intrinsic

13

Relaxation of the heart muscle- lowest arterial blood pressure

Diastole

14

Largest artery

Aorta

15

Membrane which surrounds heart

Pericardium

16

Smaller blood vessels which carry blood back to the heart

Venules

17

The pulmonary arteries carry blood to

Lungs

18

Occurs on the right side of heart

Pulmonary circulation

19

Takes blood from small intestines to liver

Heptic Portal vein

20

Returns blood from the parts of the body that are below the heart

Inferior vena cava

21

The percentage of blood in the arteries at any one time

Twenty

22

The most muscular of the heart chambers

Left ventricle

23

Take blood to and from kidneys

Renal arteries and veins

24

Separates the right atrium and ventricle

Right atrioventricular valve