- Illustrate structures of the cardiovascular system, including the anatomical structure of the heart.
- Explain the functions of the cardiovascular system.
- Identify factors that affect blood flow.
- Science Practice: Analyze how new technologies and experiments affect previous scientific explanations.
The heart is an important of the cardiovascular system.
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Structure and Function of the Cardiovascular System
- Cardio means “heart” in Greek.
- It is also known as the circulatory system.
- It is the internal transportation system.
- It maintains homeostasis, the state of maintaining a stable environment despite changing external conditions.
- It is a muscle in the mid left area of the chest, protected by the ribcage
- It is the hardest working muscle.
- The heart contracts to help blood circulate within the body.
- It pumps up to 2,000 gallons of blood per day.
- Arteries– the blood vessels that carry blood away from the heart
- Thick and muscular and elastic
- Veins-the blood vessels that carry blood back to the heart.
- Valves– the structures within the body that ensure the flow of a fluid is in one direction only.
- Capillaries– very thin blood vessels that connect arteries and veins.
- Plasma- colorless liquid
- Red Blood Cells- carry oxygen to organs
- White blood cells-help fight infection
- Platelets- seal off a blood vessel when it is cut or torn