Systems of Human Body Functions

Integumentary System

The skin protects the body, helps control body temperature, removes some wastes, produces vitamin D, senses touch and temperature, and stores fat for insulation.

Skeletal System

supports and protects the body, helps with movement, produces blood cells, and stores minerals and fats.

Muscular System

enables movement, helps maintain posture, and generates heat.

Nervous System

controls and coordinates body activities by detecting changes, processing information, and triggering responses through muscles and glands.

Endocrine System

regulates body activities by releasing hormones that travel through the blood to target organs.

Cardiovascular System

circulates blood to deliver oxygen and nutrients, remove wastes, regulate body conditions, and help protect against disease and repair damage.

Lymphoid System and Immunity

returns fluids and proteins to the blood, transports fats from the digestive system, and helps defend the body against infections.

Respiratory System

brings oxygen into the body, removes carbon dioxide, helps maintain acid-base balance, and enables sound production.

Digestive System

breaks down food, absorbs nutrients, and eliminates solid waste.

Urinary System

produces and removes urine, eliminates wastes, regulates blood and fluid balance, maintains mineral and acid-base balance, and helps control red blood cell production.

Genital Systems

produces and transports reproductive cells, releases hormones that regulate reproduction, and in females, produces milk to nourish offspring