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Grade 4 A-4 Sci. Def
Human Body Systems
Term | Definition |
---|---|
tissue | A group of cells of the same type |
organ | A group of tissues of different kinds working |
together to perform a task | |
cardiac muscle | A type of muscle that works the heart |
smooth muscle | A type of muscle found in the walls of some organs such as the stomach |
striated muscle | A muscle with light and dark stripes; a muscle you can control by thinking |
lungs | The main organs of the respiratory system |
capillary | A tiny blood vessel that allows gases and nutrients to pass from blood to cells |
heart | The muscle that pumps blood through your blood vessels to all parts of your body |
artery | A blood vessel that takes blood away from the heart |
vein | A large blood vessel that returns blood to the heart |
brain | The control center of your nervous system |
neuron | A nerve cell |
nerve | A group of neurons that carries signals from the brain to the body and from the body to the brain |
spinal cord | The tube of nerves that runs through your spine |
esophagus | The tube that connects your mouth with your stomach |
stomach | A bag made up of smooth muscles that mixes food with digestive juices |
large intestine | The last part of the digestive system where water is removed from food |