Circulatory System Flashcards

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1
Q

What is the purpose of the circulatory system?

A

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

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2
Q

What is the job of the heart?

A

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

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3
Q

How many chambers does the human heart posses?

A

4

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4
Q

Which ventricle posses higher pressure?

A

Left Ventricle

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5
Q

Why is the human heart located left of center?

A

The left ventricle is larger and more muscle dense

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6
Q

Why is the left ventricle muscularly denser than the right?

A

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

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7
Q

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

A

Through the Aorta

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8
Q

What is the Aorta?

A

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

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9
Q

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

A

Through smaller arteries

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10
Q

What is the purpose of an artery?

A

To carry blood away from the heart

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11
Q

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

A

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

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12
Q

Where does the blood travel through next after the artery?

A

Through the smaller arterioles

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13
Q

Where does the blood travel through after the arterioles?

A

Into the capillary beds

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14
Q

What are two purposes of the capillary beds?

A
  1. Facilitate oxygen delivery to cells in the body that need it
  2. Pick up carbon dioxide
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15
Q

Where does the blood travel to after the capillary beds?

A

It travels through a series of veins

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16
Q

What is the purpose of the veins?

A

To carry deoxygenated blood back towards the heart

17
Q

Describe the network of veins

A

Little veins flow together to make bigger veins

18
Q

Describe the physique of veins and

A

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

19
Q

Why are reverse flow valves necessary in vein structures?

A

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

20
Q

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

A

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

21
Q

Purpose of the Inferior and Superior vena cavas

A

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

22
Q

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

A

Right atrium

23
Q

Where do the two cavas merge into?

A

Right atrium

24
Q

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

A

Right ventricle

25
Q

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

A

Pulmonary artery

26
Q

From the pulmonary artery, blood travels into…?

A

The lungs

27
Q

From the lungs, oxygenated blood travels into the…?

A

Pulmonary vein

28
Q

What is an endotherm?

A

An organism that maintains a steady internal temperature

29
Q

What are the four valves of the heart?

A
  1. Tricuspid
  2. Pulmanary
  3. Mitrol
  4. Aortic
30
Q

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

A
  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