Exam 4 half of blood PP

Question 1

what kind of system is the heart and blood vessels

Answer 1

closed circulatory system

Question 2

pulmonary circuit

Answer 2

heart to lungs back to the heart
- needed for gas exchange

Question 3

systemic circuit

Answer 3

heart to the rest of the body back to the heart
- supply the rest of the body with oxygen, nutrients, remove and discard waste
- kidneys filter and remove most wastes and excess water

Question 4

how many chambers does the heart have

Answer 4

4 chambers

Question 5

what are the 2 upper chambers

Answer 5

atria, receive blood and transfer to the ventricles

Question 6

what are the 2 lower chambers

Answer 6

ventricles, pump blood out of heart

Question 7

what do valves do

Answer 7

prevent back flow of blood

Question 8

what is the sequence of blood movement

Answer 8

vena cava
right atrium
right ventricle
pulmonary artery
lungs (gas exchange)
pulmonary vein
left atrium
left ventricle
aorta
body

Question 9

circulation

Answer 9

sequence of blood through the body

Question 10

vena cava

Answer 10

superior and inferior gather blood from body, empty into right atrium

Question 11

right atrium

Answer 11

pumps to the right ventricle

Question 12

right ventricle

Answer 12

pumps out the pulmonary arteries

Question 13

pulmonary arteries

Answer 13

receive deoxygenated blood and transport to the lungs
- branch into capillaries - gas exchange occurs - gets larger as they exit the lungs

Question 14

pulmonary veins

Answer 14

carry oxygenated blood back towards the heart

Question 15

left atrium

Answer 15

receives blood from pulmonary veins

Question 16

left ventricle

Answer 16

largest and strongest chamber of heart
- pumps blood out of the heart through the aorta

Question 17

aorta

Answer 17

largest and strongest artery
- blood travels to body and back to vena cava system

Question 18

what are the 3 blood vessels

Answer 18

arteries
capillaries
veins

Question 19

arteries

Answer 19

carry blood away from the heart
- all but pulmonary carry oxy blood
- has the thickest walls

Question 20

capillaries

Answer 20

very small vessels where exchange occurs with tissues
- often 1 cell wide

Question 21

veins

Answer 21

carry blood towards the heart
- only pulmonary carries oxy blood
- have internal valves to prevent back flow

Question 22

what is blood pressure blood pressure and what is being measured

Answer 22

is the amount of force put on blood vessel walls
systolic pressure
diastolic pressure

Question 23

systolic pressure

Answer 23

higher number, maximal pressure on walls after heart beat

Question 24

diastolic pressure

Answer 24

the amount of force between heart beats

Question 25

What do SA and AV nodes do

Answer 25

deliver electrical signals to trigger heart contractions

Question 26

EKG ECG

Answer 26

electrocardiogram
a graphical record of the electrical currents of the heart

Question 27

P wave

Answer 27

signals atrium contraction

Question 28

QRS complex

Answer 28

sequence for ventricle contraction

Question 29

T waves

Answer 29

signals ventricles to relax