Cardiovascular System Chapter 16.1 This is a collection of organs that transport blood throughout the body.

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Presentation transcript:

Cardiovascular System Chapter 16.1 This is a collection of organs that transport blood throughout the body.

Blood Vessels Artery- blood vessel that carries blood away from the heart Vein- vessel that carries blood to the heart Capillary- a tiny blood vessel that allows an exchange between blood and cells in other tissue

Blood Red blood cells carry oxygen, carbon dioxide and nutrients. White blood cells fight pathogens(germs). Platelets form clots to stop bleeding.

2 Types of Circulation Pulmonary circulation is the flow of blood from the heart to the lungs and back again. Systemic circulation is the flow of blood from the heart to all parts of the body and back to the heart.

Cardiovascular Problems Atherosclerosis is fatty buildup in the blood vessels. A heart attack is when heart muscle doesn’t get enough blood due to a blockage of a blood vessel. A stroke happens when a blood vessel in the brain becomes blocked or breaks.

Hypertension is abnormally high blood pressure. Heart failure happens when the heart is too weak to pump enough blood to the body.

Anatomy of the Heart The two upper chambers of the heart are called the atria. The two lower chambers of the heart are the ventricles. Valves are flaplike structures that prevent blood from going backward.