Year 9 Life processes

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Yr 9 Science Chilton

Artery

large blood vessel that carries blood away from the heart

Aorta

major artery leaving the heart

Iris

coloured circular muscle in the eye that controls the size of the pupil

lipid

fats and oils - are not water soluble

diffusion

the random movement of particles from an area of high concentration to an area of low concentration

heart

a ball of muscular tissue that constantly pumps blood around the body

nucleus

contains the genetic material in a cell

cells

building block of all living things

iris

controls the size of the pupil

semi-circular canals

control balance

tip of tongue

contains taste buds for sweetness

factors affecting diffusion

temperature, space, size of particle

MRS C GREN

Movement, respiration, sensitivity, cells, growth, reproduction, excretion, nutrition

cardiac sphincter

prevents stomach acid and half digested food from mgoing back up the oesophagus

number of amino acids in proteins

20

eustachian tube

Keeps air pressure the same on both sides of the ear drum by letting air in and out of the middle ear

vitreous humour

jelly-like substance that helps the eye keep its shape

4 chambers of the heart

left and right atrium,left and right ventricle

deoxygenated blood

enters and leaves the heart on the right side

oxygenated blood

enters and leaves the heart on the left side

4 types of taste buds

sweet, sour, salty, bitter

veins

carry blood to the heart, contain valves to stop blood flowing backwards

left ventricle

chamber that the aorta leaves the heart from

ossicles

three bones of the middle ear - malleus, incus, stapes

carbohydrates

supply energy in the body

right atrium

the chamber where deoxygenated blood arrives at the heart

osmosis

movement of water and water soluble particles through a semi permable membrane

function of the lens

changes shape to focus the light on the retina

cochlea

inner ear, needed for hearing

function of pinna

collects sound waves and directs them to the ear drum

carbon dioxide and oxygen

gases that are exchanged in the lungs

starch

a long chain of glucose molecules

pulmonary artery

blood vessel that carries deoygenated blood to the lungs

3 parts of the ear

outer ear, middle ear, inner ear

factors affecting diffusion

temperature, space, size of particle

proteins

needed for growth and repair

lipids

needed for protection, cell function and brain function

sclera

tough, white protective coat around the eye

optic nerve

carries messages from the eye to the brain

4 differences between animal and plant cells

plant cells have cell wall, large vacuole, starch granules, chloroplasts

platelets

small pieces of protein that form a scab when they come in contact with oxygen

plasma

liquid part of the blood that contains blood cells, dissolved nutrients, wastes and water

red blood cells

flat, disc shape and carry oxygen

wgilte blood cells

fight infection

4 functions of the blood

transport, protection, controlling temperature, removing wastes

test for starch

iodine will trun black

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