CIRCULATORY SYSTEM AND BLOOD

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1 CIRCULATORY SYSTEM AND BLOOD The circulatory system is a group of organs which carry food and oxygen to and remove waste from every cel l in the body. Arteries-Lead away from the heart Plasma % Capillaries-Smallest blood vessels Cells % Composition of blood THE BLOOD-Ftuto-OF THE CIRCULATORY SYSTEM Red Blood Cells Carry oxygen and carbon dioxide to and from the lungs Produced in the bone marrow Living cells without a nucleus About 5,000,000 per cubic millimeter Live only about I days Blood Platelets Aid blood clotting Are formed from bone cells in bone marrow Are nonliving cells Help stop bleeding by forming clots About 300,000 per cubic millimeter White Blood Cells Nucleus Destroy bacteria which invade the body Are produced in the spleen and lymph nodes Are Jiving cells with nus:lei About 6,000 per cubic mi llimeter Composition of Blood Plasma Liquid part of blood About 90% water Contains salts and chemicals Moves through veins and arteries Human Blood Magnified Copyright Milliken Publishing Co.All rights reserved.

2 Name s s s E s 0 T z M x x L y K R M u A R T D s E A c w A 0 c H E B D B L E R M A R R 0 D A R Q B y Date CIRCULATORY SYSTEM D E v F s H J s x c OXYGEN VEINS y F E z A L B.L s w w H I T A s K L A D 0 G N G M E c E L L N D M I N c T Q p I( G w v J u L L E p E v J R R E N u c L E u s p T 0 R p R c N p L A T E L E T s R N 0 s F H 0 c H E M c A L s A T G H BLOOD _ PLATELETS CELL HEART PLASMA NUCLEUS RED CELLS CHEMICALS ARTERIES MARROW SALTS Complete the sentences below by adding the correct vowels. \, J. R - d bl - =ct--<:: -_- - lls----e- - rr - _ x _ g _ n nd c rb n d -- x - d Wh - t - bl -- d c lls d str -- b ct - r Bl -- d pl _ t _ l_ ts -- d bl -- d cl -tt_ ng. 4. Th h -- rt s th p _ mp f th c re -- t -r - s - st - m. 5. Th fl -- d f th c re -- t - r - s - st - m s bl -- d. Complete the sentences below by adding the correct consonants. 6. _ a _ a _ 1e a e - e a e oo e e 7. A e _ ie e a _ a _ ay o _ e ea 8. e1 ea o e ea 9. e _ i u _ a _ o _ y _ y e oo _ a o _ y _ e o _ e. 10. a a i _ e ui a 0 00 Copyright Milliken Publishing Co. All rights reserved.

Date _ THE HEART deoxygenated blood coming from body to lungs oxygen-rich blood returning from lungs to body Head and Arms Superior Vena Cava To all parts of the

3 Date _ THE HEART deoxygenated blood coming from body to lungs oxygen-rich blood returning from lungs to body Head and Arms Superior Vena Cava To all parts of the body Pulmonary Artery Pulmonary Vein Left Atrium Right Ventricle Inferior Vena Cava Lower Part of Body Copyright Milliken Publishing Co. All rights reserved.

4 Name _ Date _ THE PATH OF BLOOD I \ The RIGHT ATRIUM (A), which is the upper chamber of the right side of the heart, receives blood from the upper body through the SUPERIOR VENA CAVA (BJ, and from the lower body through the INFERIOR VENA CAVA (C}. This blood is a darker color because it is returning from the body carrying carbon dioxide (waste from cells) that was released by body cells as the blood deposited oxygen. Blood then flows through the TRICUSPID VALVE {DJ into the RIGHT VENTRICLE ( E J which is the lower chamber on the right side of the heart. Through contraction of the right ventricle, the darker-colored blood is forced through the PULMONARY VALVE (FJ into the PULMONARY ARTERY (GJ. The PULMONARY ARTERY (GJ branches to both the right and the left lung to pick up oxygen and release carbon dioxide wastes. While in the lungs, the blood changes color to a bright red because it is now full of fresh oxygen needed by the body. It returns from both lungs through the PULMONARY VEINS (HJ. The red blood carrying oxygen for all body cells will now re-enter the left upper chamber of the heart the LEFT ATRIUM ( IJ. It then flows through the MITRAL VALVE (JJ and into the lower left chamber; the LEFT VENTRICLE (KJ. Finally, the oxygenated blood passes through the AORTIC VALVE (L) into the AORTA (M), the largest artery'where it is sent to all parts of the body. Copyright Milliken Publishing Co.All rights reserved.

5 Name Date. THE HEART Use the information on page 1 2 to complete these activities: I. L?Jbel these parts of the heart: / /right atrium / left atrium right ventricle left ventricle pulmonary artery pulmonary vein superior vena cava inferior vena cava valves-tricuspid pulmonary mitral aortic 2. Lightly shade the sections blue that transport blood carrying carbon dioxide to the lungs. 3. Lightly shade the sections red that carry blood with a fresh supply of oxygen from the lungs to the body. 4. Draw arrows on the heart diagram to show the path blood takes on its journey through the heart. Copyright Milliken Publishing Co. All rights reserved.

6 Name Date _ REVIEW J. Explajn the function of the heart in the circulatory system. _ c'/ / 2.. carry blood to the heart. 3. carry blood away from the heart. 4. The largest artery in the body that goes from the heart is called the _ 5. Arrange the following vvords to show the correct flow of blood through the heart: superior vena cava, right ventricle, left ventricle, right atrium, left atrium, pulmonary vein, pulmonary artery, aorta. \ A. E B. F. (. _ G D H Blood contains that carry oxygen to the - cells and - wastes - away from the cells. 7. The fight bacteria that enter the body. 8. Blood contains _ that are necessary for blood clotting. 9. is the liquid part of the blood. J 0. Describe the function of the lungs in the circulatory system. 1 J. Blood going to the heart is in color, while blood going away from the heart is in color Why do you think it would be very dangerous to lose a quart of blood in an accident? Copyright Milliken Publishing Co.All rights reserved.

THE HEART. Unit 3: Transportation and Respiration

THE HEART. Unit 3: Transportation and Respiration THE HEART Unit 3: Transportation and Respiration The Circulatory System Also called the Cardiovascular System Circulates blood in the body Transports nutrients, oxygen, carbon dioxide, hormones, and blood