multicellular organism
an organism made up of multiple cells
tissue
a group of similar cells working together to perform a function.
organ
a group of tissues working together to perform a function
organ system
a group of organs working together to perform a function.
gas exchange
the transfer of gases between an organism and its environment
lungs
the organ in which gas exchange takes place
ribcage
the bones that protect the lungs
respiratory system
the organs involved in gas exchange
trachea
a tube that helps air get to the lungs
alveolus
a structure inside the lungs where gas exchange takes place with the blood
inhale
breathing in, to take in oxygen
respiration
a chemical reaction where food and oxygen are converted into energy, water and carbon dioxide
exhale
breathing out, to remove carbon dioxide
condense
the change of state from gas to liquid
contract
get smaller
diaphragm
the sheet of muscle used in breathing
lung volume
the amount of oxygen that can be taken in at one time
bone
a tissue that forms a hard structure, used to protect organs and or movement
skeleton
all of the bones together in an organism
support
the support in an organism that keeps it together
protect
things that are protected in an organism
bone marrow
is inside larger bones, produce red blood cells
biomechanics
study of the mechanical laws relating to the movement or structure of living organisms.
joint
a part of the skeleton where two bones join together
cartilage
the strong, smooth tissue that covers the end of bones to prevent them rubbing together
ligament
joins two bones together
newtons
a unit of force
tendon
joins a muscle to a bone
antagonistic muscles
a pair of muscles that work together to control the movement at a joint - as one muscle contracts, the other relaxes