Body System Video

Blood is blue when deoxygenated and turns red when oxygenated.

Blood is always bright red, regardless of oxygen levels.

Blood is blue in veins and red in arteries.

Blood is colorless until exposed to air.

Stomach

Large Intestine

Small Intestine

Liver

To break down food for nutrient absorption.

To act as messengers that bind to target cells to cause an action.

To pump blood throughout the body.

To filter waste products from the blood.

Pumping blood and transporting nutrients.

Breaking down food and absorbing water.

Maintaining osmotic balance and removing metabolic waste.

Producing hormones and regulating growth.

Producing new skin cells.

Secreting oil to moisturize the skin.

Providing a protective barrier and being continuously shed.

Sensing touch and temperature.

Coordinating voluntary and involuntary actions.

Producing gametes for reproduction.

Protecting the body from pathogens like viruses and bacteria.

Supporting the body and protecting internal organs.

Skeletal muscle

Cardiac muscle

Smooth muscle

Voluntary muscle

Neurons and Glia

Ovaries and Testes

Alveoli and Capillaries

Macrophages and Antibodies