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Unit 8 systems

Body systems

Brain The organ that is the main control system of the nervous system
Spinal Cord Column of nerve tissue running from the base of the brain through the vertebral column
Nerves Send messages from the brain to the body and from the body back to the brain.
Neurons A nerve cell that is specialized to receive and conduct electrical impulses
Electrical Messages Is the nerve impulse that is given off by the Neurons
Cerebrum The largest part of the brain - controls voluntary movements and thinking processes
Cerebellum Located at the base of the brain - is responsible for body coordination and balance
Brain Stem Connects the Brain to the spinal cord - controls involuntary activities such as breathing and digestion
Skull Group of bones that surround and protect the brain and brain stem
Voluntary An impulse that a person controls. Example: Kicking, throwing, walking
Involuntary An impulse that a person does not control. Example: Heartbeat, Breathing, Digestion
Pancreas Produces Insulin which regulates the amount of sugar in the blood
Pituitary Gland LOCATED INSIDE THE BRAIN, releases different hormones that regulate body functions
Adrenal Glands LOCATED AT THE TOP OF EACH KIDNEY, releases different hormones that regulate body functions
Thyroid Gland LOCATED IN THE NECK, releases hormones that regulate body functions
Right Atrium receives oxygen-poor blood from the body after it has delivered food and oxygen and picked up waste products
Right Ventricle receives the oxygen poor blood from the right atrium and sends the blood to the lungs to pick up oxygen and release CO2
Left Atrium receives oxygen-rich blood from the lungs and sends it to the left ventricle
Left Ventricle contracts and sends oxygen-rich blood to the body
Vena Cava returns blood to the right atrium
Esophagus food moves down this long tube from the mouth to the stomach using contractions called peristalsis
stomach where food is broken down into a paste by gastric juices and churning
small intestine allows the absorption of the digested food into the blood
liver delivers digestive juices to the small intestine
large intestine where useable water and materials are absorbed
Skeletal Muscles voluntary, striped or striated, move bones
Cardiac Muscles involuntary, found only in the heart
Smooth Muscles involuntary, found in digestive organs and blood vessel walls
Trachea transports air from the throat to the lungs, also called the windpipe
Epiglottis small flap that closes when a person swallows, prevents food from entering trachea
Alveoli tiny air sacs in the lungs that are used for exchange of carbon dioxide and oxygen
Diaphragm muscle located beneath the lungs, which expands and contracts that allows to air to be carried in and out of lungs
Kidneys primary organs of the excretory system, bean shaped organs that are the main blood filters of the body and remove liquid wastes, excess water and bile from the blood
Bladder stores urine until it is released from the body
Ureters long tubes from kidneys to bladder through which urine flows
Created by: jgray73



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