circulatory systeme

Question 1

what major role do the valves play in our heart?

Answer 1

the valves prevent the backwards flow of blood.

Question 2

what causes the sound of a heart beat?

Answer 2

the thing that causes the sound of a heart beat is the alternating of the opening and closing of the valves.

Question 3

explain the 2 circulation loops of the circulatory system.

Answer 3

the two circulation loops are:
1. the pulmonary circulation loop, is when deoxygenated blood exits the right ventricle then it travels to the pulmonary trunk where it splits between the right and left pulmonary arteries. these arteries transport the deoxygenated blood to the lungs, then it turns into oxygenated blood and goes to the pulmonary veins and to the left atrium.(7)

2. the systemic circulation loop, is when oxygenated blood is pumped from the left ventricle, through the aorta, through the systemic arteries, then to the arterioles and capillaries that supply the oxygen and nutrients in the blood to body tissue, when this happens carbon dioxide is absorbed. then the deoxygenated blood go through the systemic veins where it is brought to the superior and inferior vena cava, then it flows into the right atrium.(8)

Question 5

what is the function of arteries?

Answer 5

the arteries send oxygen-rich blood away from the heart.

Question 6

what is the largest artery in the human body?

Answer 6

the largest artery is the aorta

Question 7

what are the smallest arteries in the human body?

Answer 7

the smallest arteries are the arterioles.

Question 8

what artery in the heart is the exception to this?

Answer 8

the exception to this is the pulmonary artery which carries oxygen poor blood from the right ventricle to the lungs.

Question 9

where does the exchange of gasses take place?

Answer 9

the exchange of gasses takes place in the capillaries

Question 10

what is the function of the veins?

Answer 10

the function of the veins is to carry oxygen poor blood towards the heart.

Question 11

what is the largest vein in the human body?

Answer 11

the largest vein in the human body is the vena cava

Question 12

what are the smallest vein in the human body?

Answer 12

the smallest vein in the human body are the venules.

Question 13

what vein connected to the heart is the exception to this?

Answer 13

the exception to this is the pulmonary vein which carries oxygen rich blood from the lung to the left atrium.

Question 14

how do blood vessels play a role in temperature control?(2)

Answer 14

1.blood vessels play a role in temperature control because when you are really cold the blood vessels constrict through the surface capillaries, to slow the blood flow to the cold tissue, to reduce heat loss from the blood.
2. blood vessels play a role in temperature control when you are really hot because the blood vessels expand, so you can get more oxygenated blood to the tissue to disperse heat in your body.

Question 15

list and describe the major components of blood.

Answer 15

the major components of blood is:
1. the plasma which is the liquid component of blood, plasma transports blood cells through out the body along with, nutrients, waste, anti-bodys, and hormones.
2. the blood cells, red blood cells, carry oxygen from the lungs to the body and carry carbon dioxide form the body back to the lungs.
white blood cells, protect the body from infection.

Question 16

explain the process of clotting

Answer 16

the process of clotting starts when there in a wound or injury so the blood vessel constricts to slow the blood flow to the injured area, then the platelets from a “plug” at the opening of the wound, then fibrins gather at the injury to pull the sides of the blood vessel together and close the wound.

Question 17

what are the 8 blood types?

Answer 17

A+
A-
B+
B-
O+
O-
AB+
AB-

Question 18

what blood type is the universal donor? And the recipient?

Answer 18

the blood type that is the universal donor is O-
the universal recipient is AB+