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Skin

largest organ in your body.

Epidermis

the outer protective layer that is made up of epithelial tissue. (prevents bacteria and viruses from entering your body.)

dermis

inner layer of the skin and is made up of connective tissue, nervous tissue, and muscle tissue.

Pores

secrete sweat produced in sweat glands to cool the body.

lungs

allow you to breathe in oxygen and breathe out carbon dioxide. Cells need oxygen to function. (made of connective and epithelial tissue.)

organ

a group of tissues that is organized and works together to perform a specific function.

alveoli

an air sac. to increase the surface area for efficient exchange of oxygen and carbon dioxide.

capillaries

tiny thin walled blood vessels surrounding the alveoli.

heart

organ that moves blood throughout the body. It is divided into 4 chambers - left and right atria (or atrium), and the left and right ventricles.

right atria and right ventricle

pumps blood to the lungs so that the blood can pick up oxygen.

left atria and ventricle

pumps the oxygenated blood from the lung through the aorta to the rest of the body.

esophagus

food travels down because of the rhythmic constriction and relaxation of the smooth muscles that line the tube. (peristalsis)

stomach

churns food and mixes it with digestive juices and enzymes

intestines

areas of chemical digestion and removal of wastes.

roots

anchor the plant in the soil, collect water from the surrounding soil, and store food made in other parts of the plant.

photosynthesis

chemical reaction in which carbon dioxide and water are converted into sugar and oxygen

stem

• transports water and nutrients throughout the plant • supports the leaves and flowers.

flower

main function is to produce seeds through sexual reproduction.

Artery

carry oxygenated blood away from the heart to tissues that need it.

Vein

return deoxygenated blood to the heart.

homeostasis

The maintenance of constant internal conditions despite a changing external environment . (Organ systems working together)

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