What are the following facts about. Identify the system of the body. The heart beats around 3,000,000,000 (3 billion times) in the average person's life.

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Presentation transcript:

What are the following facts about. Identify the system of the body. The heart beats around 3,000,000,000 (3 billion times) in the average person's life About 8 million blood cells die in the human body every second, and the same number are born each second. Blood that is high and rich in oxygen is a bright, healthy red, while, blood that is poor in oxygen is a dull red. Blood is never blue.

What are the following facts about. Identify the system of the body. Blood is ALWAYS RED, actually. Veins look blue because light has to penetrate the skin to illuminate them, blue and red light (being of different wavelengths) penetrate with different degrees of success.

Take your pulse 1.While sitting at your desk take your own pulse and record your answer. 2.Stand up and walk in place for 1 minute. 3.While standing still take your pulse and record. What happened to your pulse? If it did change, Why? Predict your pulse if you were to run for a minute.

Take your pulse 1.While sitting at your desk take your own pulse and record your answer. 2.Stand up and walk in place for 1 minute. 3.While standing still take your pulse and record. What happened to your pulse? If it did change, Why? Predict your pulse if you were to run for a minute.

FUNCTION – “The Life Pump” Circulates blood throughout the body to deliver nutrients (including oxygen) – Oxygen – Carbon dioxide – Waste materials – Nutrients Nutrients

CARDIOVASCULAR OR CIRCULATORY SYSTEM Structures: 1.Heart – Pump that moves your blood 2.Blood Vessels – Carry blood throughout your body 3.Blood – Carry essential nutrients to your cells 4.Veins – Carry blood TO your heart 5.Arteries – Carry blood AWAY from heart 6.Capillaries - enable the actual exchange of water and chemicals between the blood and the tissues

CELLS Cardiac (heart) cells Blood cells – Red blood cells carry oxygen – White blood cells help fight infection

Exit 1. A Student has been running and stops immediately for a break to check his pulse. He then walks two more miles and checks his pulse again. When would his pulse be the highest? a. Running b. Before running c. walking d. Always the same

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