12 Body Systems, Their Parts, and Their Function.

Circulatory System
Consists of blood, heart, arteries, capillaries, and veins. Pumps blood to and from the heart to supply oxygen to the body.
Digestive System
Organs include oral cavity, esophagus, stomach, liver, gallbladder, pancreas, small and large intestine, and rectum.

Functions: break down food and deliver the products to the blood for dispersal to the body cells
Endocrine System
collection of glands that secrete hormones into the blood which regulate growth, development, and homeostasis.

Organs: hypothalamus, pituitary gland, thyroid, adrenal glands.
Lymphatic system
a secondary circulatory system that helps the body fight pathogens and maintain its fluid balance

parts: lymph nodes, tonsils, thymus, spleen
Muscular System
organ system that creates movement (muscles, tendons). Also regulates body temperature and protects the body.
Nervous System
the body's speedy, electrochemical communication system, consisting of all the nerve cells of the peripheral and central nervous systems

Parts: Brain, Nerves, Spinal Cord
Reproductive System
organ system which functions in creating offspring (penis and testes in males, ovaries, uterus, and vagina in females)
Respiratory System
Responsible for breathing.
Parts: Lungs, pharynx, larynx, trachea, bronchi, lungs and diaphragm
Skeletal System
the hard structure (bones and cartilages) that provides a frame for the body of an animal
Urinary System
consisting of the kidneys, ureters, bladder, and urethra, removes wastes from the blood and helps to maintain water and electrolyte balance
Integumentary System
organ system that includes har, skin, and nails and protects the body from pathogens and maintains homeostasis