The Circulatory System:
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1 The Circulatory System: The Body s Transport System
2 The Circulatory System!
3 What is the CIRCULATORY SYSTEM? A HIGHWAY NETWORK that LINKS all parts of your body. Consists of the HEART, BLOOD VESSELS, and BLOOD.
4 What is the FUNCTION of the circulatory system? 1) To DELIVER NEEDED SUBSTANCES TO CELLS. (ex. oxygen and glucose) 2) To REMOVE WASTE PRODUCTS, carrying them AWAY from cells. 3) To FIGHT DISEASE by carrying white blood cells to source of disease.
5 How does the circulatory system work? The HEART is the PUMP that makes it work. Each time the HEART BEATS, it PUSHES BLOOD through the BLOOD VESSELS of the circulatory system.
6 What does the HEART look like? The heart is a HOLLOW, MUSCULAR organ that pumps your blood. The RIGHT and LEFT SIDES of the heart are completely SEPARATED by a wall of tissue called the SEPTUM.
7 What does the HEART look like? Each side of the heart has 2 CHAMBERS (4 all together). The upper chamber is called an ATRIUM. The lower chamber is called a VENTRICLE.
8 What does the HEART look like? VALVES SEPARATE the chambers and prevent blood from FLOWING in the WRONG DIRECTION.
9 How does the HEART pump? When the strong MUSCLES around the VENTRICLES contract, they exert a FORCE on the blood. This force PUSHES the blood OUT of the heart INTO THE ARTERIES.
10 Circulation
11 Where does the blood go after it leaves the HEART? After leaving the heart, the blood travels in TWO LOOPS. The LOOPS are the CIRCLE part of the CIRCULATORY system.
12 Where does the blood go after it leaves the HEART? In the FIRST LOOP, blood travels from the HEART TO THE LUNGS AND BACK. At the LUNGS, the blood gets RID OF CARBON DIOXIDE and PICKS UP OXYGEN.
13 Where does the blood go after it leaves the HEART? In the SECOND LOOP, blood travels from the HEART OUT TO THE BODY AND BACK. After the first loop, the blood is OXYGEN-RICH and DELIVERS OXYGEN out to the body where it is USED BY MUSCLES.
14 Circulation Why is it important that the septum separates the left and right sides of the heart?
15 Circulation - A Closer Look at Blood Vessels What are BLOOD VESSELS? BLOOD VESSELS are the HOLLOW TUBES that carry your blood around your body. There are 3 TYPES: 1) ARTERIES 2) CAPILLARIES 3) VEINS
16 Circulation - A Closer Look at Blood Vessels What are ARTERIES? ARTERIES carry blood AWAY FROM THE HEART. They have THICK, MUSCULAR walls that are STRONG and FLEXIBLE and can stand the enormous PRESSURE created by the heart.
17 Circulation - A Closer Look at Blood Vessels What are CAPILLARIES? CAPILLARIES are TINY vessels that run all through your BODY S TISSUE. The WALLS are very THIN to allow OXYGEN and WASTES to be exchanged between BLOOD and CELLS.
18 Circulation - A Closer Look at Blood Vessels What are VEINS? VEINS carry blood BACK TO THE HEART. They have THINNER WALLS than arteries do, because there is much LESS PRESSURE from the heart.
19 Circulation - A Closer Look at Blood Vessels
20 Circulation - A Closer Look at Blood Vessels Ø Ø Ø Ø Amazing Heart Facts Your heart is about the same size as your fist. An average adult body contains about 5 quarts of blood. All the blood vessels in the body joined end to end would stretch 62,000 miles or two and a half times around the earth. The heart circulates the body s supply about 1,000 times each day. Ø The heart pumps the equivalent of 5,000 to 6,000 quarts of blood each day.
21 From Body Flow chart of Blood Flow Right Atrium Right Ventricle To Lungs From Lungs Left Atrium Left Ventricle To Body
22 Circulation - Blood
23 Circulation - Blood
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