Lab 6: Cardiovascular System

Question 1

Is the blood that enters the right atrium O2 poor or rich and why?

Answer 1

O2 poor because it is coming back from tissues where it dropped off oxygen and picked up CO2.

Question 2

Is the blood that enters the left atrium o2 poor or rich?

Answer 2

O2 rich because it is coming back from the lungs.

Question 3

Which ventricle is more muscular and why?

Answer 3

the left because it has to pump the blood from around the body.

Question 4

What is the function of the semilunar valve?

Answer 4

keep the blood flowing in one direction.

Question 5

what Is another name for the “chord tendinae”? What do they do?

Answer 5

heartstrings. They hold the atrioventricular valves in place while the heart contracts.

Question 6

Trace the path of blood from the right side of the heart to the aorta.

Answer 6

vena cava to right atrium to tricuspid valve to right ventricle to semilunar valve to pulmonary artery to lungs to pulmonary vein to left atrium to bicuspid valve to left ventricle to semilunar valve to aorta.

Question 7

Which side of the heart pumps O2 poor blood?

Answer 7

Right side.

Question 8

What does an SA node cause and what is it also called?

Answer 8

Causes the atria to contract and is also called a pacemaker.

Question 9

What does the P wave indicate?

Answer 9

contractions.

Question 10

What does the AV node cause?

Answer 10

Ventricular contraction.

Question 11

What does the QRS wave inidicate?

Answer 11

That ventricles are about to contract.

Question 12

Voltage changes in the ECG are relates to the:

Answer 12

ventricular contractions about to occur.

Question 13

Which sound in the heart is louder, sub or dub?

Answer 13

Lub.

Question 14

Why is the blood pressure the highest just after the ventricle systole?

Answer 14

Chamber contracts.

Question 15

Why does exercise increase heart rate?

Answer 15

Blood needs oxygen rich blood and supplies oxygen demand, and exercise increases the pump of blood.

Question 16

Are red blood cells bigger or smaller and do they have a nucleus?

Answer 16

Smaller and they have no nucleus.

Question 17

Why are veins more “flabby” than arteries?

Answer 17

veins don’t have the thick inner layer that arteries do and do not go through as much pressure.

Question 18

List the vessels blood follows through the pulmonary circuit.

Answer 18

Right ventricle to pulmonary artery to lungs, back through pulmonary veins to left atrium.

Question 19

List the vessels blood follows through the systemic circuit from the heart to the kidneys, back to the heart.

Answer 19

left ventricle out through the aorta, into renal artery, into kidney, renal vein, inferior vena cava, right atrium.

Question 20

List the vessels blood follows through the hepatic portal system from the aorta to the inferior vena cava.

Answer 20

Leave aorta, to mesenteric arteries, to digestive tract, to hepatic portal vein, to liver, to hepatic vein, to inferior vena cava.

Question 21

Major artery and vein in the head:

Answer 21

Carotid-artery

Jugular-vein

Question 22

major artery and vein in the arms:

Answer 22

subclavian for both.

Question 23

Artery and vein in the kidney

Answer 23

renal for both

Question 24

artery and vein in legs:

Answer 24

Illiac for both.

Question 25

Artery and vein in intestines:

Answer 25

Mensenteric: artery

hepatic portal: vein

Question 26

What type of blood cells are lymphocytes and monocytes?

Answer 26

white

Question 27

Nutrients exit and wastes enter through which blood vessel?

Answer 27

capillaries

Question 28

Identify the artery that nourishes the heart tissue:

Answer 28

Coronary.

Question 29

Which chamber of the heart receives received venous blood from systemic circuit?

Answer 29

Right atrium

Question 30

Identify the vessel that conducts blood from left ventricle.

Answer 30

Aorta

Question 31

Which is higher, systolic or diasolic pressure?

Answer 31

Systolic