Systems Of The Human Body

Skeletal System

Provides support, protection, and structure to the body. Composed of bones, joints, and cartilage.

Muscular System

Enables movement and generates heat. Consists of skeletal, smooth, and cardiac muscles.

Nervous System

Controls and coordinates body activities. Comprised of the brain, spinal cord, and peripheral nerves.

Circulatory System

Transports oxygen, nutrients, hormones, and waste products throughout the body. Composed of the heart, blood vessels, and blood.

Respiratory System

Facilitates gas exchange between the body and the environment. Includes the lungs, trachea, bronchi, and diaphragm.

Digestive System

Breaks down food into nutrients that can be absorbed by the body. Comprises the mouth, esophagus, stomach, intestines, liver, and pancreas.

Endocrine System

Regulates body functions through the secretion of hormones. Includes glands such as the pituitary, thyroid, adrenal, and reproductive glands.

Urinary System

Filters waste products from the blood and maintains fluid balance. Consists of the kidneys, ureters, bladder, and urethra.

Reproductive System

Responsible for the production of offspring. Differs between males and females and includes organs such as the ovaries, uterus, testes, and penis.

Integumentary System

Protects the body from external factors and regulates temperature. Composed of the skin, hair, and nails.

Lymphatic System

A network of vessels, organs, and tissues that help maintain fluid balance and defend the body against infections. It consists of lymphatic vessels, lymph nodes, the spleen, thymus, and tonsils. Lymphatic vessels carry lymph, a clear fluid containing white blood cells, throughout the body.