the heart and blood vessels

Question 1

why does the septum separates the two sides o the human heart

Answer 1

to prevent oxygenated blood and deoxygenated blood from mixing

Question 2

describe one difference between the walls of the right and left ventricle

Answer 2

the walls of the left ventricle were thicker than the walls of the right

Question 3

which vein carries blood richest in oxygen

Answer 3

pulmonary vein

Question 4

which vein carries blood between the intestine and the liver

Answer 4

aorta

Question 5

which vein carries blood lowest in metabolic waste

Answer 5

renal vein

Question 6

which vein carries blood into the right atrium of the heart

Answer 6

vena cava

Question 7

give a detailed account of the heart cycle, to include the functions of the sa node and the av node

Answer 7

sa node sneds an impulse to the aorta
av node sends an impulse to the ventricles
atria contracts, bicuspid anf tricuspid valves open, blood is pumped to the ventricles

Question 8

name the period of the heart cycle when the cardiac muscle of the heart is contracting, non contracting

Answer 8

contracting - systole
non contracting - diastole

Question 9

explain how the ventricles are contracting

Answer 9

semilunar valves are open

Question 10

state th location of the SA node in the heart

Answer 10

wall of right atrium

Question 11

name the circuit to which the right ventricle pumps blood

Answer 11

pulmonary

Question 12

name the circuit to which the left ventricle pumps blood

Answer 12

systemic

Question 13

each heartbeat creates two audible sounds, what causes these sounds

Answer 13

valves closing

Question 14

what is the function of the coronary artery

Answer 14

to supply heart muscle with blood

Question 15

describe the effect on the cicurlatory system of smoking

Answer 15

increase heart rate

Question 16

why is the blood in the right side of the heart kept separate from blood in the left

Answer 16

the blood in the right is deoxygenated, the blood in the left is oxygenated

Question 17

what is meant by the term diastole

Answer 17

when heart chambers relax

Question 18

how did you identify the right hand side from the left hand side of the heart

Answer 18

the left ventricle side has a thicker cardiac muscle than the right side

Question 19

on which surface of the heart did you observe the coronary artery

Answer 19

top front surface

Question 20

describe how you dissected the heart to identify the bicuspid valve

Answer 20

we disinfected our scalpel and put on our lab coats, we placed the heart on our lab coats, we placed the heart on our dissecting board and identified the top and bottom surface, we carefully cut the left ventricle open with a scalpel to identify our bicuspid valve

Question 21

state the precise location of one semilunar valve and describe how you further dissected the heart to locate this valve

Answer 21

the semi lunar valve was located at the base of the aorta, we cut into the aorta

Question 22

the sounds created during the cardiac cycle

Answer 22

caused by valves closing, tricuspid and bicuspid valve close

Question 23

state the precise location and describe the role of the SA node

Answer 23

causes the ventricles, atria and valves to contract (systole) SA node is located in the wall of the right atriums

Question 24

state the precise location and describe the role of AV node

Answer 24

AV sends regular electrical impulses down the septum, the AV node is located in the septum

Question 25

what exactly is being measured when a persons blood pressure is taken

Answer 25

force of blood against wall go the artery