Body Systems

Forms the external body covering, protects from injury, regulates body temperature, synthesizes vitamin D, contains sweat and oil glands, and has cutaneous nerve receptors.

Integumentary System

Consists of bones, joints, and cartilage; protects and supports body organs, provides muscle attachment for movement, serves as the site of blood cell formation, and stores minerals.

Skeletal System

Composed of skeletal, smooth, and cardiac muscles; produces movement, maintains posture, and generates heat.

Muscular System

Includes the brain, spinal cord, and nerves; a fast-acting control system that responds to internal and external changes and activates muscles and glands.

Nervous System

Made up of glands that secrete hormones; responsible for growth, reproduction, and metabolism, with hormonal influence circulating through the body via the cardiovascular system.

Endocrine System

Composed of the heart and blood vessels; transports oxygen, carbon dioxide, nutrients, and wastes in the body.

Cardiovascular System

Includes lymph nodes, lymphatic vessels, and tonsils; responsible for fighting infections, cleansing blood, involved in immunity, and returning fluids to blood vessels.

Lymphatic/Immune System

Keeps the blood supplied with oxygen and removes carbon dioxide.

Respiratory System

Comprises the stomach and intestines; breaks down food, allows for nutrient absorption, and eliminates indigestible materials as feces.

Digestive System

Includes the kidneys, ureter, bladder, and urethra; eliminates nitrogenous wastes, maintains acid-base balance, and regulates water and electrolytes.

Urinary System

Composed of glands and genitalia; produces offspring with testes producing sperm and male hormones, and ovaries producing eggs and female hormones.

Reproductive System