Circulatory System

Question 1

What is the purpose of the circulatory system?

Answer 1

Carries oxygenated blood out of the lungs, brings its to the parts of the body that need it, and brings the deoxygenated blood back to the lungs

Question 2

What is the job of the heart?

Answer 2

Power the circulatory system by pumping blood out of the lungs and into the body and then back to the lungs

Question 3

How many chambers does the human heart posses?

Answer 3

4

Question 4

Which ventricle posses higher pressure?

Answer 4

Left Ventricle

Question 5

Why is the human heart located left of center?

Answer 5

The left ventricle is larger and more muscle dense

Question 6

Why is the left ventricle muscularly denser than the right?

Answer 6

So to keep the pressure high enough so that the oxygenated blood will leave

Question 7

Where does the oxygenated blood travel next after leaving the left ventricle?

Answer 7

Through the Aorta

Question 8

What is the Aorta?

Answer 8

Main artery of the heart which extends from left chamber down through the chest and abdomin into the pelvic groin area

Question 9

Where does the oxygenated blood travel to after leaving the aorta?

Answer 9

Through smaller arteries

Question 10

What is the purpose of an artery?

Answer 10

To carry blood away from the heart

Question 11

Describe the physique of an artery and why it is as such

Answer 11

They are thick walled and muscular to maintain high pressure as the blood travels along

Question 12

Where does the blood travel through next after the artery?

Answer 12

Through the smaller arterioles

Question 13

Where does the blood travel through after the arterioles?

Answer 13

Into the capillary beds

Question 14

What are two purposes of the capillary beds?

Answer 14

1. Facilitate oxygen delivery to cells in the body that need it
2. Pick up carbon dioxide

Question 15

Where does the blood travel to after the capillary beds?

Answer 15

It travels through a series of veins

Question 16

What is the purpose of the veins?

Answer 16

To carry deoxygenated blood back towards the heart

Question 17

Describe the network of veins

Answer 17

Little veins flow together to make bigger veins

Question 18

Describe the physique of veins and

Answer 18

Thin walls and have valves which prevent reverse flow up the pressu gradient

Question 19

Why are reverse flow valves necessary in vein structures?

Answer 19

The pressure gradient in the circulartory system steadaly reduces further down the line

Question 20

Where does the blood travel to after flowing through progressively larger veins?

Answer 20

Into 2 major veins: Inferior vena cava, Superior vena cava

Question 21

Purpose of the Inferior and Superior vena cavas

Answer 21

To route deoxygenated blood from the lower and upper parts of the body, respectively

Question 22

What is the point of lowest pressure in the circulatory system?

Answer 22

Right atrium

Question 23

Where do the two cavas merge into?

Answer 23

Right atrium

Question 24

Deoxygenated blood in the heart flows from the right atrium and into?

Answer 24

Right ventricle

Question 25

Deoxygenated blood leaves the right ventricle and flows into the…?

Answer 25

Pulmonary artery

Question 26

From the pulmonary artery, blood travels into…?

Answer 26

The lungs

Question 27

From the lungs, oxygenated blood travels into the…?

Answer 27

Pulmonary vein

Question 28

What is an endotherm?

Answer 28

An organism that maintains a steady internal temperature

Question 29

What are the four valves of the heart?

Answer 29

1. Tricuspid
2. Pulmanary
3. Mitrol
4. Aortic

Question 30

Describe from beginning to end, the path of blood through the circulatory system (including arteries) from Vena Cava

Answer 30

1. Vena Cava
2. Right atrium
3. Tricuspid valve
4. Right ventricle
5. Pulmonary valve
6. Pulmonary artery
7. Lungs
8. Pulmonary vein
9. Left atrium
10. Mitral valve
11. Left ventricle
12. Aortic valve
13. Aortic artery