Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Circulatory System Circulatory System: body’s transport system. Allows body to move materials from one place to another, which are carried in the blood. Heart: Muscle that acts as the pump for the circulatory system. Blood vessels: Tubes that carry blood throughout the body. 3 types of Blood Vessels: Arteries: Carry oxygen-rich blood AWAY from the heart. Veins: Carry oxygen-poor blood TOWARD the heart. Capillaries: very tiny branches of arteries and veins. They connect the smallest arteries with the smallest veins. Cholesterol: Waxy, fat-like substance made in liver & found in certain foods such as foods from animals. (milk, cheese, meat) Keeping Your Circulatory System Healthy 1. Eat a balanced diet: prevents clogged blood vessels & high blood pressure. 2. Avoid Stress: Tension strains the heart & blood vessels. 3. Try to maintain your ideal weight: Carrying extra weight puts strain on your heart. 4. Exercise: Regular activity helps the heart & circulation. 5. Don’t smoke: Chemicals in smoke reduce the amount of oxygen your red blood cells can carry. How Exercise Affects the Heart (Don’t write) Quick Time™a nd a Quick Time™a nd a Quick Time™a nd a TIFF ( Unco mpre ssed ) dec ompr essoTIFF r ( Unco mpre ssed ) dec ompr esso r TIFF ( Unco mpre ssed ) dec ompr esso r ar e nee ded to see this pictur e. ar e nee ded to see this pictur e. ar e nee ded to see this pictur e. Physical inactivity increases the risk of heart disease. Physical activity fights against heart disease risk factors by: 1.Reducing blood cholesterol 2. Reducing blood pressure & resting heart rate, which decreases the workload on the heart. 3. EXERCISE!!!: Regular activity helps the heart & circulation. 4.Helps relieve stress. 5. Helps with weight loss. Effects of Smoking on the Heart (Don’t write) Quick Time™a nd a TIFF ( Unco mpre ssed ) dec ompr esso r ar e nee ded to see this pictur e. Smoking damages the heart and blood vessels. Cigarette smoke increases the activity of blood platelets, which cause blood to clot. Reduces the ability of blood vessels to dilate (expand) and contract to adjust blood flow. These changes contribute to artery blockages, which can cause heart attack or stroke. Materials Carried in the Blood (Don’t write) Dissolved oxygen from lungs goes from blood into cells. Cells need oxygen to get energy from food. Dissolved food particles go to cells to nourish them. Blood carries special cells that fight germs. Blood carries hormones, chemicals, to cells from places in the body where they are made. Hormones cause cells to grow or change in some way. Dissolved wastes exit cells & are removed from body.