The Circulatory System Flashcards

1
Q

What is the Circulatory System?

A

The Circulatory System is the main transport system in the human body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are Blood Vessels?

A

Blood vessels are channels that carry blood throughout your body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the arteries job?

A

The arteries job is to carry oxygenated blood away from the heart.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a description of the artery?

A

Arteries are tough on the outside but they contain a smooth interior layer of epithelial cells that allows blood to flow easily.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the Capillaries job?

A

The capillaries job is to connect the arteries to the veins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a description of the Capillaries?

A

The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the veins job?

A

The veins job is to carry deoxygenated blood back to the heart.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a description of the veins?

A

Veins are like arteries but not as strong or as thick. Unlike
arteries, veins contain valves that ensure blood flows in only one direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why doesn’t arteries require valves?

A

Arteries don’t require valves because pressure from the heart is so strong that blood is only able to flow in one direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the Structure and Function of the Blood Vessels?

A

Blood is transported inarteries,veinsandcapillaries.

Blood is pumped from the heart in the arteries then it is returned to the heart in the veins.

The capillaries connect the two types of blood vessel and molecules are exchanged between the blood and the cells across their walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The Arteries?

A

Carries blood under high pressure

Have thick muscular and elastic walls to pump and accommodate blood

Always carries blood away from the heart

Carry oxygenated blood, except for the pulmonary artery

Has a type of supporting tissue called connective tissue which provides strength

Has a narrow lumen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The Veins?

A

Carries blood under low or negative pressure

Has thin, less muscular than arteries.

Always carries blood to the heart

Always carries deoxygenated blood, except for the pulmonary vein.

Has less connective tissue than arteries.

Has a wide Lumen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the Lumen?

A

The Lumen is the channel inside the blood vessel that carries the blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the Heart primarily responsible for?

A

The heart is primarily responsible for pumping blood and distributing oxygen and nutrients throughout the body.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is the circulatory system the most important?

A

The circulatory system does a very important job in your body.It carries oxygen and essential nutrients to all cells around the body in arteries and carries the waste products and carbon dioxide in veins. The average human body contains over 60,000 miles of blood vessels.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the functions of the Cardiovascular System?

A

 Circulates OXYGEN and removes Carbon Dioxide.

 Provides cells with NUTRIENTS.

 Removes the waste products of metabolism to the excretory organs for disposal.

 Protects the body against disease and infection.

 Clotting stops bleeding after injury.

17
Q

Explain Transportation

A

Blood serves as a transport vehicle through all nourishment needed by the body moves from one area of the body to another.

Fuel in the form of oxygen is carried from the lungs to the heart and then to all parts of the body where it is used. At the same time carbon
dioxide (waste) is transported to the cells of the lungs to be expelled.

Blood plasma transports the nutrients absorbed from the digestive tract to all parts of the body where they are needed.

Hormones secreted by the endocrine system into the blood are transported to where they are
needed.

The blood is the vehicle used for transport. The arteries, veins, capillaries are the routes used by the vehicle (blood) to carry these substances to their destination.

18
Q

Explain Regulation

A

If the body is excessively hot, then the blood vessel in the dermis layer of the skin will dilate. In doing so, they allow excessive heat
to pass through the skin.

If the body is cold, the body needs to conserve heat. The blood vessels in the dermis layer of the skin constrict, thereby reducing the body’s ability to
lose heat through the skin.

Cells and tissues in the body require a pH level of 7.4 to function
optimally.

Interstitial fluid or the fluid among tissues receives compounds and ions from the blood plasma to maintain this level, thus regulating the body’s pH level.

19
Q

Explain Protection

A

White blood cells act as soldiers in the blood. They guard against bacteria, viruses or any objects that are foreign to the body.

They act against these threats by destroying them and removing them from the body.

They protect the body against blood loss by forming blood clots in areas where the skin has been broken.

20
Q

What makes up the Circulatory System?

A

The heart, blood and blood vesselswork together to service the cells of the body. Using the network of arteries, veins and capillaries, blood carries carbon dioxide to the lungs (for exhalation) and picks up
oxygen. From the small intestine, the blood gathers food nutrients and delivers them to every cell.