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7C Muscles and bones
Key words
Term | Definition |
---|---|
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 |