Level of Organization PDF
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Summary
This document provides an overview of the different organ systems in the human body, including the nervous, circulatory, respiratory, digestive, and excretory systems. The document defines major organs for each, and describes their basic functions.
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**Level of Organization** - Models can help us learn about our internal body parts and their functions. - Human organisms contain many organ systems.The circulatory system, respiratory system ,digestive system and excretory system all have special functions in the body. - The he...
**Level of Organization** - Models can help us learn about our internal body parts and their functions. - Human organisms contain many organ systems.The circulatory system, respiratory system ,digestive system and excretory system all have special functions in the body. - The heart is the central organ of the circulatory system.It acts like a pump, continuously sending blood throughout the body. - Arteries carry oxygenated blood away from the heart to the rest of the body.Veins bring oxygenated blood back to the heart. - Capillaries are tiny blood vessels where oxygen and nutrient exchanged with cells. - The heart pumps blood to move around the body. - Kidneys clean our blood by removing waste and extra water. - The stomach helps break down food so our body can use the nutrients. - The brain controls the functions of all our organs. - Lungs help us breathe by taking in air with oxygen and getting rid of the air with waste carbon dioxide. +-----------------------+-----------------------+-----------------------+ | OrganSystem | Major Organs | Simple Functions | +-----------------------+-----------------------+-----------------------+ | Nervous System | Brain,Spinal Cord, | Controls body | | | | activities and send | | | Nerves | electric signals from | | | | the brain back and | | | | forth to the other | | | | parts of the body | +-----------------------+-----------------------+-----------------------+ | Circulatory System | Heart Blood | Transports blood | | | vessels(arteries, | carrying | | | veins,capillaries) | oxygen,nutrients,and | | | | removes waste | +-----------------------+-----------------------+-----------------------+ | Respiratory System | Lungs,Trachea,Bronchi | Allows oxygen to move | | | ,Diaphragm | from the lungs into | | | | the blood and carbon | | | | dioxide to move from | | | | the blood back to the | | | | lungs | +-----------------------+-----------------------+-----------------------+ | Digestive System | Mouth,Esophagus,Stoma | Breaks down | | | ch,Small | food,absorbs | | | Intestine,Large | nutrients,eliminates | | | intestine,Liver | waste | | | Pancreas, Rectum, | | | | Anus | | +-----------------------+-----------------------+-----------------------+ | Excretory System | SystemKidneys,Bladder | Urethra Removes waste | | | ,Ureters, | and excess substances | | | Urethra | from the body. | +-----------------------+-----------------------+-----------------------+
