What organ does this...?
produces urine by flittering wastes and excess water from the blood
a) stomach
b) heart
c) kidneys
d) liver
c) kidneys
100
why do we breathe?
we need oxygen and need to give away carbon
100
what is the curculatory system?
picks up and transports nutrients and oxygens to cell and carries waste to the cells that eliminate them
100
how long is the digestive system?
10 m long
200
what part of a cell does plant cells have that animal cells don't?
cell wall and chlorplasts
200
tissues only found in the heart....?
a) blood
b) red blood cells
c) skin epithelia
c) skin epithelia
200
How many chemicals do cigarettes have?
4000 chemicals
200
what is the smallest blood vessel?
capillaries
200
what process is this apart of the digestive system?
Food is broken down chemically by the gastric juices that contain HCl and other enzynees that breaks protein down in our food
a) ingestion
b) elimination
c) digestion
c) digestion
300
why do some cells have more than one type of organelle?
to function better
300
what does the nervous tissue do?
tissue that relay signals from wither the brain and spinal cord or from the outside enviroment
300
what does smoking do to out breathing ?
damages cilia, preventes them from keeping out foreign materials out of our bodies
300
name all the parts of the heart
right atrium
right ventricle
left atrium
left ventricle
pulmonary artery
aprta
300
what is the processes carried out by the digestive system?