Circulatory System

The main function of the circulatory system is to transport materials such as oxygen, nutrients, hormones, and waste products throughout the body.

If a person exercises, then their heart rate will increase.

The circulatory system responds by delivering more oxygen to cells during physical activity.

Blood vessels transport nutrients and oxygen to various parts of the body.

White blood cells help protect the body from diseases by fighting and destroying germs.

The heart pumps blood throughout the body, supplying oxygen and nutrients while removing waste products.

Arteries are blood vessels that carry oxygen-rich blood away from the heart to the body's tissues.

Veins are blood vessels that carry oxygen-poor blood back to the heart.

Capillaries are tiny blood vessels where the exchange of oxygen, carbon dioxide, nutrients, and waste occurs between blood and tissues.

Blood is made of red blood cells, white blood cells, platelets, and plasma.