Human Body Systems

Integumentary System

contains the hair skin and nails, its main functions are to form the body's external covering, protect deeper tissue from injury, and help regulate body temperature.

Skeletal System

contains the bones and joints, its main functions are to protect and support the body's organs, provide a framework the muscles use to cause movement, and stores minerals.

Muscular System

includes the skeletal muscle, cardiac muscle, and smooth muscle, its main functions are to move the body and move substances throughout the body, maintain posture, and produce heat.

Nervous System

includes the brain, spinal cord, nerves, and sensory receptors, its main functions are to respond to internal and external changes by acting an appropriate response, and processing information.

Respiratory System

includes the nasal cavity, trachea, lungs, and bronchus, its main functions are to assist with gas exchange with the external environment, and keep the blood supplied with oxygen and remove carbon dioxide.

Cardiovascular system

includes the heart and blood vessels, its main functions are to pump blood around the body, and transport oxygen, carbon dioxide, nutrients, and waste. 

Lymphatic and immune system

includes the lymph nodes, spleen, thymus, and bone marrow, its main functions are to filter fluid in the body, and attack foreign substances in the body.

Digestive system

includes the stomach, intestines, oral cavity, and esophagus, its main functions are to break down food into nutrients, absorb nutrients, and get rid of waste.

Urinary system

includes the kidneys, bladder, ureters, and urethra, its main functions are to eliminate waste from the body and regulate the balance of blood and water.

Endocrine system

includes the testis, adrenal gland, pituitary gland, and ovaries, its main functions are to secrete hormones that regulate processes such as growth, reproduction, and metabolism.

Reproductive system

 includes the vaginia, ovaries, and uterus in woman and the penis, testis, and prostate in men, its main functions are to produce offspring to ensure the continuation of a species, and to regulate hormones.