muscular system

enables movement of the body and internal organs

nervous system

generates action potentials (nerve impulses) to regulate body activities

endocrine system

regulates body activities by sending out hormones

cardiovascular sytem

Blood vessels transport blood, which carries oxygen, carbon dioxide, nutrients, wastes, etc. The heart pumps blood.

lymphoid system and immunity

returns proteins and fluids to blood

respiratory system

transfers oxygen from inhaled air to blood and carbon dioxide from blood to exhaled air

digestive system

physically and chemically breaks down food, absorbs nutrients, eliminates solid wastes

genital/reproductive system

Gonads produce gametes (sperm or oocytes) that unite to form a new organism; release hormones that regulate reproduction, associated organs transport and store gametes; mammary glands produce milk.

integumentary system

Protects body and regulates temperature.

skeletal system

Protects and supports body organs and provides a framework the muscles use to support movement. Made up of bones and joints

urinary system

produces, stores, and eliminates urine