BIOLOGY

living things

M.R.S G.R.E.N (movement, response, sensitivity,growth,reproduction,excretion,nutrition) respiration is how animals get energy from food.

animal cell=cell membrane and nucleus plant cell=cell membrane, nucleus and cell wall

vertebrates=spine invertebrate=no spine

cells and microscopes*

animal cell=cytoplasm cell wall and nucleus plant cell=cell wall, cell membrane, cytoplasm, nucleus

tissues a small group of the same cells doing same function organ two or more tissues working together systems=a number of organs working together

microscope course focus knob=roughly height of stage wanted, fine focus knob= more accurate

food

iodine is used to test for starch (yellow/orange to blue/black)

benedicts solution is used to test for simple sugars (blue t brick red)

protein test s sodium hydroxide and copper sulfate aka bureit test

digestion enzymes

digestion=breakdown of food

2 types of digestion in mouth= physical and chemical. oesophagus,stomach,small intestine,liver, pancreas, large intestine

enzymes cause=growth of muscles,production of hair calls,formation of blood cells,breakdown of poisonous substances

amylase acts on starch to produce maltose, maltase breaks down maltose to produce glucose

respiration (release of energy from food)

glucose+oxygen= water vapour+carbon dioxide+energy

carbon dioxide turns limewater milky

gaseous exchange+ blood vessel brigs blood low in oxygen and high in CO2 to the aveolus, capillaries take the waste products into aveolus and put oxygen into the blood vessel,the blood leaves high in oxygen and low in CO2

trachea-bronchus-bronchiole-alveolus image

circulatory system

blood= plasma+red blood cells+white blood cells+platelets

funtions red blood cells=transport oxygen white blood cells=fight of infections plateletsclot blood plasma=transport chemicals and heat

arteries=away from heart, veins=to heart

arteries=valves,thick wall. veins=thin wall,no valve. capillaries=allow materials pass in and out of blood

heart1-vena cava 2-pulmonary artery 3-aorta 4-pulmonary vein. left side is more muscular. atrium=up ventricle=down valves, cardiac muscle

excretion

renal vein=left side,renal artery=right side. kidneys=filter wastes,2 ureters, bladder,1 urethra

skeletal muscular system

types of joints=fixed (skul) ball and socket(hip and shoulder), hinge(elbow), synvial(knee)

joints=where bones meet, tendons=connects bone to muscle,ligaments=connects bone to bone cartilage=protects ends of bones

antogonistic pairs=muscles that carry out opposite affects eg trice and bicep

sensory system

central nervous system=spinal cord and brain

motor nerves=messages from brain to muscles sensory nerves=messages from nerves to brain

eyeball=iris-colour, lens-focus light on the retina, retina-absorb light,optic nerve-messages from eye to brain,cornea-let light pass into eye, ciliary muscle-contracts or relaxes lens depending on light

reproductive system

male= testis-make sperm, scrotum-ball sack, sperm duct-carries sperm to urethra and out of penis, penis-allows urine or sperm pass out of body

female- ovaries-eggs(ovuls) produced here, fallopian tube-fertislisation, uterus- implantation here, cervix-openig of uterus, vagina-muscular tube where penis releases sperm

menstrual cycle- day 1-5 period, day 6-12 lining f womb develops, day 13-15 fertile period,(ovulation), day 16-28 lining of womb stays in place

placenta-holds baby in place and allows substances into baby and carries waste out f baby

contraception-male=condoms,female=cap with covers cervix, pills

genetics

chromosomes-made of DNA and protein found in the nucleus of cell walls

genes are short sections of DNA located on chromosomes

human body has 23 pairs of chromosomes in every nucleus except for sperm and ovum cells

sex cells/ gametes only contain 23 chromosomes because when they join with the opposite gamete 46 chromosomes are then present

1-egg 2-zygote---cell division--ball of cells-- 3)embryo

plants

root functions- anchor the plant, absorb water and minerals,some plants (carrots)store food in roots

stem function-support leaves and flower, transport

flower function- produce seeds so can reproduce

water transport-roots take in water and xylem transports it up to the leaves and flower

pores of a leaf are called stomata,stomata are located on the underside of the leaves, the loss of water through the leaves of a plant is called transpiration

mineral transport- transported around the flower and then phleom brings nutrients down to the roots to the soil

xylem-transports water phleom-transports water

photosynthesis the way a plant with chlorophyll makes food

carbon dioxide+water--sunlight and chlorophyll= glucose+oxygen

tropism-a plants response to an outside stimulus

geotropism( gravity), phototropism (sunlight)

plant reproduction- asexual