circulatory system

Question 1

what is the circulatory system

Answer 1

transport system that allowed cells to
uptake nutrients
excrete waste

Question 2

how does the transport system require the action of the heart

Answer 2

the heart is a muscle that moves blood around body through blood vessels

Question 3

how does the transport system require the action of blood

Answer 3

it’s a fluid tissue that carries nutrients, waste, and other molecules

Question 4

what is a artery

Answer 4

blood vessel that carries blood away from the heart with oxygen
exception: pulmonary artery

Question 5

what type of walls do arteries have

Answer 5

thick, strong and stretchy

Question 6

what pressure do arteries carry blood at

Answer 6

high pressure

Question 7

what layers r arteries composed of

Answer 7

3 layers
outer and inner connective
tissue
middle = muscle fibres & elastic connective tissue

Question 8

what is a artiole

Answer 8

small arteries

Question 9

what is the diameter of a small artiole regulated by

Answer 9

autonomic nervous system

Question 10

what is vasoconstriction

Answer 10

narrowing of blood vessels allowing less blood to tissues

Question 11

what is vasodilation

Answer 11

widening of the blood vessels allowing more blood to tissues

Question 12

what are capillaries

Answer 12

smaller vessels in body
thickness is = to a single cell layer

Question 13

what do capillaries branch through

Answer 13

tissues

Question 14

what happens in the capillaries

Answer 14

cite of gas exchange between blood and tissues via diffusion
RBC past through in single file

Question 15

veins

Answer 15

carry blood towards the heart
exception: pulmonary vein

Question 16

is the blood carried by veins oxygenated or deoxygenated

Answer 16

deoxygenated

Question 17

what type of walls do veins have

Answer 17

thin walls

Question 18

are veins high pressure or low

Answer 18

low pressure

Question 19

veins blood reservoir

Answer 19

65% of total blood volume

Question 20

venules

Answer 20

smaller veins where deoxygenated blood collects from capillaries
merges into veins and goes back to heart

Question 21

What is the heart surrounded by

Answer 21

Fluid filled membrane (pericardium)

Question 22

Pulmonary circulation

Answer 22

Pumps blood from heart to all lungs back to the heart
Deoxygenated blood is pumped from the right side of the heart to the lungs via pulmonary arteries
Blood picks up oxygen and travels to the left side of the heart via pulmonary veins

Question 23

Pulmonary arteries

Answer 23

Only group of arteries that carry deoxygenated blood

Question 24

Pulmonary veins

Answer 24

Only group of veins that carry oxygenated blood

Question 25

Systemic circulation

Answer 25

Flow of blood from heart to body parts, back to the heart Left side of heart pumps blood to entire body via aorta (largest artery)

Question 26

Systemic circulation starts:

Answer 26

Starts in intestines, finishes in liver

Question 27

What are the 2 systemic circulation veins

Answer 27

Superior/ inferior vena cava Return blood to right side of the heart

Question 28

Chambers

Answer 28

Each side of heart = 2 muscular chambers = 4 chambers

Question 29

What are chambers separated by

Answer 29

A wall called septum

Question 30

2 thin walls in chambers

Answer 30

Called atria, recieve blood

Question 31

2 thick walls in chambers

Answer 31

Called ventricles and pump blood out of heart

Question 32

Valves

Answer 32

Separate atria and ventricles Blood flows from atria -> ventricles Attached to papillary muscles by tendons called chordae tendineu

Question 33

What happens when ventricles relax

Answer 33

Atrial pressure > vent pressure = valves open

Question 34

What happens when ventricles contact

Answer 34

Ventricle pressure > = valves close

Question 35

Mitral valves r on the

Answer 35

Left side

Question 36

Tricuspid valves are on the

Answer 36

Right side

Question 37

Semilunar valves

Answer 37

Separate ventricles and arteries

Question 38

Aortic semi lunar valve

Answer 38

Separates left ventricle and Arita

Question 39

Pulmonary semilunar valves

Answer 39

Separates right ventricle and pulmonary artery