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7C Muscles and bones

Key words

Organ A group of tissues working together to perform a function
Organ system A group of organs working together to perform a function
Adaptation The features something has to allow it to do its job or to survive
Breathing The movement of muscles that make the lungs expand and contract
Breathing rate The number of times you inhale and exhale in one minute
Breathing system The organ system that allows the exchange of gases in the lungs
Carbon dioxide The waste gas produced by respiration and makes up 0.04% of the air
Cell The basic unit of life
Contract To get smaller
Diaphragm Organ that contracts to increase the volume of the lung
Excretion Getting rid of waste
Exhalation Breathing out
Gas exchange system See Breathing system
Inhalation Breathing in
Oxygen Makes up 21% of the air
Relax When a muscle stops exerting a force
Respiration The process in which organisms release energy from a substance
Ventilation The movement of air in and out of your lungs
Artery Blood vessel that carries blood away from the heart
Vein Blood vessel that carries blood to the heart
Blood vessel A tube that carries blood in the body
Bone marrow Tissue inside bones that make blood
Capillary Thin walled blood vessel that links arteries and veins
Haemoglobin The substance that carries oxygen in red blood cells
Heart chambers Spaces in the heart that blood moves through
Plasma The liquid part of the blood
Pulse A feeling of the heart beating that can be felt in the arteries
Pulse rate The number of times a pulse can be felt in one minute
Red blood cells Blood cells that carry oxygen
White blood cells Blood cells that fight micro-organisms
Backbone A series of small bones (vertebrae) that form a chain the make the main support of a body
Cartilage A slippery substance used to reduce friction in joints or for flexibility (ear, nose)
Fixed joint Where two bones meet but cannot move
Flexible joint Where two bones meet and can move by the use of muscles
Fracture Break
Ligament Tissue that connects bones
Skeleton All the bones that support an organism (206 in humans)
Skull Collection of bones that protect the brain
Tendon Small bones of the backbone
Vertebrae Small bones of the backbone
Antagonistic pair Two muscles that work a joint by pulling a bone in opposite directions
Biomechanics The study of how muscles and bones work together to move your body
Impulse An electrical signal that travels in the nervous system
Locomotor system Organ system that contains all your muscles and bones that allow you to move
Mitochondria Organelles in cells where respiration occurs
Newton The unit of force (N)
Spinal chord Large bundle of nerves that runs through the vertebrae (backbone)
Addictive Something that makes you feel that you need to have it
Caffeine A stimulant that increases the speed at which nerves carry impulses
Cannabis A drug that can cause memory loss with long-term abuse
Cocaine Powerful stimulant that can block arteries and cause mental problems with long term abuse
Depressant Drug that decreases the speed at which nerves carry impulses
Drug Substance that affects the way your body works
Ecstasy A stimulant that can cause depression, mental illness and even death with long-term abuse
Heroin A dangerous depressant that causes vomiting and severe headaches
Impulse Electrical signal carried by a nerve cell
Medicine A drug that helps the body to ease the symptoms of a disease or cure a disease
Nervous system Brain, spinal cord and all your nerves
Reaction time The time it takes you to respond to a stimulus in the environment
Recreational drug A drug used for its mind-altering effect rather than as a medicine
Side-effect Harmful or unpleasant effects caused by drugs
Solvent A liquid used to dissolve things
Solvent misuse Sniffing solvents used in glue and other things
Stimulant Drug that increase the speed at which nerves carry messages
Substance abuse See Substance misuse
Substance misuse Taking any substance in a way that causes harm to the body
Created by: andrewweng0406