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Human Body Systems
Term | Definition |
---|---|
Body Organization Levels (smallest to largest unit) | Cells - Tissues - Organs - Organ Systems |
Tissues | Groups of cells that are alike in structure that perform a specific function |
Organs | Groups of different tissue types working together to perform a specific function |
Organ Systems | Groups of organs working together to perform a specific function |
Classify the brain | Organ |
Classify smooth muscles | Tissues |
Classify neurons | Cells |
Skeletal System Function | Provides structure and support, allows for movement, protects vital organs, creates blood cells |
Muscular System Function | Provides movement and allows for reaction to environmental conditions |
Circulatory System Function | Carries needed materials (oxygen, glucose, waste products) to and from body cells and transports disease fighting cells |
Respiratory System Function | Moves oxygen into the body into the body and removes carbon dioxide and excess water from the body |
Digestive System Function | Breaks down food into useable molecules, provides a location for glucose molecule absorption, and rids the body of solid waste |
Excretory System Function | Collects and rids the body of cellular waste in liquid form |
Nervous System Function | Receive environmental information and directs a response if necessary; helps maintain homeostasis |
Immune System Function | Eliminate pathogens that attack body cells |
Peristalsis | Waves of muscle contractions that move food through the digestive system |
Voluntary Muscles | Muscles that make purposeful movement |
Involuntary Muscles | Muscles that work automatically without thought |
Voluntary Muscle Example(s) | Skeletal muscles |
Involuntary Muscle Example(s) | Smooth and cardiac muscles |
Site of most mechanical digestion | Stomach |
Site of most chemical digestion | Small intestines |
Major organs and tissues of the skeletal system | Bones, cartilage, ligaments, and marrow |
Major organs of the muscular system | Skeletal muscles, smooth muscles, cardiac muscles |
Major organs of the digestive system | Mouth, esophagus, stomach, small intestines, and large intestines |
Major organs of the respiratory system | Nose, trachea, and lungs |
Major organs of the excretory system | Kidneys, ureters, urinary bladder, urethra |
Major organs of the nervous system | Brain, spinal cord, neurons |
Major organs of the immune system | Lymphocytes (white blood cells) |
Bones in the back that protect the spinal cord | Vertebrae |
Process for muscle pairs to provide movement | One contracts while one relaxes |