human body systems

nervous system

main organs: brain, spinal cord, nerves

function: transmits signals between the brain and the rest of the body. And controls the whole body.

circulatory system

main organs: heart, arteries, veins, the blood

function: transports oxygen and all nutrients in the blood to all body parts

respiratory system

main organs: lungs, nasal cavity (nose), trachea, the diaphragm

function: transfers oxygen into the blood and removes carbon dioxide from the blood to release into the air

muscular system

includes all types of muscles

function: allow body movement

immune system

main organs: lymphatic vessels that transport the lymph, the lymph nodes, the spleen, the thymus, the bone marrow, etc.

function: protect the body from infections and diseases

digestive system

main organs: the mouth, the esophagus, the stomach, the small intestine, the big intestine, the liver, the gallbladder, and the pancreas

function: break down food , eliminates waste

how long does the digestive process take

24-33 hours

excretory/urinary system

main organs: two kidneys, two ureters, a bladder, and a urethra

function: filter blood from toxins, eliminate excess salts and water from the body, regulates the level of water and salt in the body

Integumentary system

Main organs: the skin, hair, and nails

Function: acts as a barrier against infections and injury, protecting the body, it regulates body temperature(sweat), protects against ultraviolent radiation

endocrine system

Main organs: multiple glands in the body

Function: produces all the hormones that coordinate the organ’s interactions

reproductive system

Main organs:

male: penis, testes, and sperm ducts

female: uterus, the vagina, the ovaries and oviduct

Function: male and female produce gamete cells that will create an embryo

female: responsible for growing the embryo “foetus develops” and give birth to the baby.