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Circulatory System

Circulatory System. Let’s find out how blood is pumped through our body!. BLOOD. There are 3 cells inside each drop of blood and they all have a job These cells are: Red blood cells- carry oxygen to our body’s cells

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Circulatory System

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  1. Circulatory System Let’s find out how blood is pumped through our body!

  2. BLOOD • There are 3 cells inside each drop of blood and they all have a job • These cells are: • Red blood cells- carry oxygen to our body’s cells • White blood cells- fight bacteria in our body and help keep our body clean • Platelets- clot our blood to help form scabs

  3. More about BLOOD • Plasma is the liquid part of our blood. It is yellow in color and carries nutrients to our cells and picks up carbon dioxide waste. Plasma is not a cell.

  4. The Heart • The heart is the hardest working muscle in our body • The heart is about the size of your fist • Your heart never stops working since it is always pumping rich, oxygenated blood to all the cells in your body

  5. More about The Heart • Your heart takes blood with no oxygen and pumps it to the lungs to pick up oxygen. The lungs send oxygen-rich blood back to the heart to be pumped out to the rest of your body.

  6. The Heart • The heart is made up of four rooms, or chambers. Right Atrium Left Atrium Right Ventricle Left Ventricle

  7. Right Atrium Left Atrium Right Ventricle Left Ventricle Parts of the heart • The right side has deoxygenated blood from the body • The left side has oxygen-rich blood from the lungs

  8. Blood vessels • There are 3 types of blood vessels to help carry blood around our body: • 1. Veins- carry blood to your heart. Make the #2 with your fingers- for “to”. What letter does that make? A v for vein

  9. Another blood vessel is • 2. Arteries- carry blood away from your heart (artery & away both start with A)

  10. The 3rd kind of vessel: • 3. Capillaries- connect veins and arteries. (capillary & connect both start with c) • THIS IS WHERE THE OXYGEN & NUTRIENTS LEAVE THE BLOOD AND ENTERS YOUR BODY’s CELLS. carbon dioxide waste also leaves your body’s cells and enters your blood to eventually leave the body.

  11. Let’s look at our heart PULMONARY ARTERY AORTA UPPER (SUPERIOR) VENA CAVA PULMONARY VEIN LOWER (INFERIOR) VENA CAVA LEFT ATRIUM RIGHT ATRIUM LEFT VENTRICLE RIGHT VENTRICLE Courtesy of 3DScience.com

  12. EACH PART OF THE HEART HAS A JOB AORTA- LARGEST ARTERY; BLOOD LEAVES THE HEART THROUGH THIS ARTERY AS THE HEART PUMPS IT TO THE REST OF OUR BODY PULMONARY ARTERY- TAKES DEOXYGENATED BLOOD FROM THE HEART INTO LUNGS UPPER (SUPERIOR) VENA CAVA-BRINGS DEOXYGENATED BLOOD FROM TOP PART OF BODY INTO THE HEART PULMONARY VEIN- TAKES OXYGEN RICH BLOOD BACK INTO HEART FROM LUNGS LOWER (INFERIOR) VENA CAVA- BRINGS DEOXYGENATED BLOOD FROM LOWER PART OF BODY INTO THE HEART LEFT ATRIUM- TOP SECTION OF HEART; RECEIVES OXYGEN RICH BLOOD FROM THE PULMONARY VEIN RIGHT ATRIUM-TOP SECTION OF HEART;RECEIVES DEOXYGENATED BLOOD FROM VENA CAVAS LEFT VENTRICLE- LOWER SECTION OF HEART; RECEIVES OXYGEN RICH BLOOD FROM LEFT ATRIUM AND PUMPS INTO THE AORTA RIGHT VENTRICLE- LOWER SECTION OF HEART; TAKES BLOOD FROM RIGHT ATRIUM AND PUMPS INTO PULMONARY ARTERY Courtesy of 3DScience.com

  13. PATH OF BLOOD THROUGH THE HEART • BLOOD ALWAYS FLOWS THROUGH OUR BODY IN ONE CIRCULAR PATTERN. FOLLOW ALONG WITH A DIAGRAM OF THE HEART TO SEE THIS PATTERN:

  14. FIRST, DEOXYGENATED BLOOD ENTERS THE HEART THROUGH THE UPPER (SUPERIOR) AND LOWER (INFERIOR) VENA CAVAS. • IT ENTERS THE HEART IN THE RIGHT ATRIUM. • THEN BLOOD IS PUMPED INTO THE RIGHT VENTRICLE. • IT IS PUMPED OUT OF THE VENTRICLE INTO THE PULMONARY ARTERY WHICH TAKES IT AWAY FROM THE HEART AND INTO THE LUNGS. • HERE IT PICKS UP OXYGEN.

  15. THE oxygenated BLOOD THEN LEAVES THE LUNGS AND GOES BACK TO THE HEART THROUGH THE PULMONARY VEIN. • OXYGEN RICH BLOOD ENTERS THE HEART IN THE LEFT ATRIUM AND IS THEN PUMPED INTO THE LEFT VENTRICLE. • IT IS PUMPED FROM THIS VENTRICLE INTO THE LARGEST ARTERY IN OUR BODY, THE AORTA. • AS THE HEART PUMPS, THE BLOOD IS PUMPED INTO THE AORTA AND CONTINUES THROUGH OUR BODY inside THE OTHER ARTERIES.

  16. ONCE OXYGEN LEAVES OUR BLOOD AS IT’S DROPPED OFF TO OUR CELLS, THE BLOOD ENTERS VEINS WHICH BRING IT BACK TO THE VENA CAVAS AND THE CYCLE STARTS ALL OVER AGAIN!

  17. Here’s how all those veins and arteries look in our body! Courtesy of: hon.nucleusinc.com

  18. PATH OF BLOOD THROUGH THE HEARTlet’s write it out! • Upper (superior) & lower (inferior) vena cava • Right atrium • Right ventricle • Pulmonary artery • Lungs to get oxygen • Pulmonary vein • Left atrium • Left ventricle • Aorta • Rest of the body

  19. Let’s watch this in action!! • http://www.nhlbi.nih.gov/health/dci/Diseases/hhw/hhw_pumping.html Teachers click on the link above. Once on the site, you must click “Start” for the animation video to begin.

  20. The end!Tell your partner 3 things you’ve learned about the circulatory system

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