heart

Question 1

order of the circulatory system

Answer 1

vena cava
right atrium
right ventricle
pulmonary artery
lungs
pulmonary veins
left atrium 
left ventricle
aorta

Question 2

order of the digestive tract

Answer 2

mouth/teeth
oesophagus
stomach
small intestine
large intestine
rectum
anus

Question 3

order of the respiratory system

Answer 3

nose/mouth
pharynx
larynx 
trachea
bronchi
bronchioles
alveoli

Question 4

order of the excretory system

Answer 4

aorta
kidneys
ureters
bladder
urethra

Question 5

excretion

Answer 5

the process of removing waste

Question 6

what makes up urine

Answer 6

salt, water & urea

Question 7

organs in the digestive system

Answer 7

mouth and teeth
oesophagus
stomach
liver
gall bladder
pancreas
small intestine
large intestine
rectum
anus

Question 8

what do the liver and the gall bladder do

Answer 8

the liver produces bile and the gall bladder stores it

Question 9

what are the three blood vessels

Answer 9

arteries
veins
capillaries

Question 10

artery

Answer 10

takes blood away from the heart

oxygenated

Question 11

vein

Answer 11

carry blood to the heart

deoxygenated

Question 12

capillary

Answer 12

one cell thick

allows substances to pass in and out of the blood

Question 13

valves

Answer 13

prevent backflow of blood which allows the veins to get blood back to the heart

Question 14

which side of the heart is thickest and why

Answer 14

the left side because it has to pump blood around the body

Question 15

what is ammonia

Answer 15

ammonia is a toxic chemical in the blood

Question 16

what is urea

Answer 16

when metabolism occurs, ammonia is turned into urea in the liver

Question 17

organs of the excretory system

Answer 17

kidneys
liver
lungs
skin

Question 18

nephrons

Answer 18

tiny structures in the kidneys that filter the blood

Question 19

valve disease

Answer 19

may narrow from scarring (stenosis)
may leak (regurgitation or insufficiency)
may not close properly (prolapse)

Question 20

atherosclerosis

Answer 20

the build-up of plaque on the inside of arteries resulting in the restriction of blood flow
(if the artery is in the heart a heart attack will follow)

Question 21

coronary heart disease

Answer 21

fatty deposits blocking important blood vessels

Question 22

pericarditis

Answer 22

if the pericardium (the thin sac surrounding the heart) gets infected it fills with fluid. as a result, the heart cannot beat and this restricts the heart from filling up with blood

Question 23

lub dub sound

Answer 23

the valve between the atrium and the ventricle closes (lub) and the valve between the ventricle and the aorta closes (dub)

Question 24

stenosis

Answer 24

when valves become narrow from scarring

Question 25

regurgitation or insufficiency

Answer 25

when valves leak

Question 26

prolapse

Answer 26

when valves don’t close properly

Question 27

diaphragm

Answer 27

the diaphragm contracts and flattens when you inhale. this creates a vacuum effect that pulls air into the lungs. when you exhale, the diaphragm relaxes and the air is pushed out of the lungs

Question 28

gas exchange

Answer 28

when the cells in the alveoli take in oxygen and get rid of carbon dioxide