The Circulatory System

Warm Up Write down three things you can do to keep your heart healthy

The Circulatory System This system carries food and oxygen to all the cells of the body. It is made up of the heart, blood & blood vessels.

The Circulatory has 2 big jobs Big job # 1 – Carrying Food, Water, & Oxygen. The circulatory system has the task of delivering the necessary “goods” to the cells. It’s like getting the newspaper each morning.

Big Job #2 -Removing Wastes from the cells. In our everyday activities we create waste. The wastes cannot stay in the cells. They would build up and prevent the cells from doing their job. The circulatory system carries the waste to other parts of the body where they are filtered and removed from the body

The Heart The heart is a muscle. Its job is to pump blood to all of the cells in your body. The heart is the strongest muscle in the human body. It pumps the blood to your brain cells, nerves, and bone cells. It pumps 24 hours a day without a break.

FACTS ABOUT HEART The Heart is about the size of your fist and is located in the middle of your chest. Its upper chambers are the right atrium and left atrium. The lower chambers are the right ventricle and the left ventricle. Arteries pump oxygen rich blood to your body; away from heart Veins carry waste filled blood back to the heart and then to the lungs, to be cleaned and sent back out the the body.

Terms Red Blood Cells- Carry oxygen & carbon dioxide to & from the lungs. Produced in the bone marrow. White Blood Cells- Destroy bacteria and are produced in the spleen.

Terms Blood Platelets- Aid blood in clotting to held stop bleeding. Plasma- Liquid part of blood. About 90% water Blood is made up of 45% cells and 55% plasma

REVIEW How is the circulatory system similar to a paper boy? How big is your heart and were is it located? What blood vessel carries blood to your cells, away from your heart? What blood vessel carries blood back to your heart?

Review continued… Aid in blood clotting? Which blood cells carry oxygen and carbon dioxide to and from the lungs? Which blood cells destroy bacteria and where are these cells produced? What is the liquid part of blood called? Name 3 parts of the circulatory system. Name 3 blood vessels.

Capillaries Capillaries are extremely small vessels located within the tissues of the body that transport blood from the arteries to the veins.