Body System

Nervous system

Brain, Spinal cord, peripheral nerves

Acts through electrical signals to control rapid responses of the body, also responsible for higher functions like consciousness, memory, creativity

Circulatory system

heart, blood vessels, blood

Transports nutrients, O2, CO2 wastes, electrolytes and hormones throughout the body

Respiratory system

Nose, pharynx, larynx, trachea, bronchi, lungs

Obtains O2 and eliminates CO2 helps regulate pH by adjusting the rate of removal of acid-forming CO2

Muscular system

Skeletal muscles

Allow body movement generates heat: important in temp regulation

Skeletal system

Bones, cartilage, joints

Support and protect body parts; calcium is stored in the bone

Immune system

Lymph nodes, thymus, bone marrow, tonsils, spleen, appendix, white blood cells

Defends against foreign invaders and cancer cells paves the way for tissue repair

Integumentary system

Skin, nails, hair

Serves as a protective barrier between the external environment and remainder of the body; the sweat glands and adjustments in skin blood flow are important in temperature regulation

Urinary system

Kidneys, ureters, urinary bladder, urethra

Important in regulating the volume, electrolyte composition, and pH of the internal environment; removes waste and excess water, salt, acid and other electrolytes from the plasma and eliminates them in the urine

Digestive system

Mouth, pharynx, stomach, esophagus, small/large intestine, salivary glands, liver, gallbladder, pancreas

Obtains nutrients, water, and electrolytes from the external environment and transfers them into the plasma; eliminates undigested food residues to the external environment

Endocrine system

All hormone secreting tissues, hypothalamus, pituitary gland, thyroid, adrenals, pancreas, gonads, kidneys, pineal, thymus

Acts by means of hormones secreted into the blood to regulate processes that require duration rather than speed like metabolic activities, water/electrolyte balance

Reproductive system

Male- testes, penis, prostate gland, seminal glands, bulbourethral gland

Female-Ovaries, uterus, vagina, breasts

Not essential for homeostasis but essential for perpetuation of the species