Human body systems and functions

digestive system

breaks down food in to substances that cells can absorb

circulatory

delivery system of the body. Delivers nutrients and oxygen throughout the body cells and picks up waste

respiratory

brings oxygen into the body and removes carbon dioxide

excretory

disposes of wastes and controls body fluid levels

immune

fights infections and illness. Includes white blood cells

skeletal

provides support and structure to the body. Blood cells are made in bone marrow

muscular

allow movement of bones and body parts by working with the nervous and skeletal systems

nervous

receives stimuli from inside and outside of the body and responds to change. Maintains homeostasis

integumentary

the skin protects and provides a barrier to keep out foreign materials and to prevent the body from drying out

endocrine

regulates body functions through chemical messengers called hormones, controls things such as homeostasis, development, and growth

reproductive

performs reproduction, controls male and female functions and behaviors.

main organs of the digestive system

Mouth: beginning of digestion

Stomach: acids and muscles break down food

Small intestines: absorbs nutrients from food

Large intestine: absorbs water

main organs of the circulatory system

Heart: Muscle that pushes blood through arteries

Arteries: carries blood away from heart.

Veins: Carry blood to heart that is low in oxygen and high in waste

main organs of the respiratory system

Lungs: take in oxygen and release carbon dioxide

Diaphragm: muscle that forces the lungs to expand and contract and bring air into and out of the lungs.

main organs of the excretory system

Kidney: a filter for the blood. Includes the sweat glands, the lungs, the kidney system, urinary system and others.

main organs of the immune system

includes white blood cells that fight bacteria and viruses.

main organs of the skeletal system

Bones, cartilage, ligaments, tendons

main organs of the muscular system

muscles includes voluntary and involunatry

main organs of the nervous system

Brain, spinal cord, nerves

main organs of the Integumentary

Includes skin (largest organ of the body) hair and fingernails

main organs of the endocrine

Glands and hormones

main organs of the reproductive

Female: Ovaries, uterus, vagina

Male: testis, penis, scrotum

Connective tissue

Provides support for your body and connects all its parts

Nerve tissue

Carries electrical and chemical messages between the brain and other parts of the body

Muscle tissue

Makes part of your body move by contracting and shortening