The Flow of Blood in the Human Circulatory System.
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Transcript of The Flow of Blood in the Human Circulatory System.
![Page 1: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/1.jpg)
The Flow of Bloodin the
Human Circulatory System
![Page 2: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/2.jpg)
Blood re-enters heart from body
• Oxygen-poor blood
• Enters right atrium
• Upper body – Superior (Upper) Vena Cava
• Lower Body – Inferior (Lower) Vena Cava
RA
![Page 3: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/3.jpg)
Right atrium contracts
• Tricuspid Valve opens
• Oxygen-poor blood
• Blood enters Right Ventricle
RA
RV
![Page 4: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/4.jpg)
Right Ventricle Contracts
• Pulmonary valve opens
• Oxygen-poor blood
• Blood enters Pulmonary Artery
RV
![Page 5: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/5.jpg)
Blood enters capillaries in lungs
• Pulmonary artery takes oxygen-poor blood to lungs
• Gas exchange occurs – Carbon dioxide leaves blood, oxygen enters blood
• Oxygen-rich blood returns to heart via Pulmonary Vein
![Page 6: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/6.jpg)
Blood Enters Left Atrium
• Oxygen-rich blood returns to heart
• Pulmonary veins empty blood into left atrium
RV
LA
![Page 7: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/7.jpg)
Left Atrium Contracts
• Bicuspid valve opens
• Oxygen-rich blood
• Blood exits left atrium, enters left ventricleRV
LA
LV
![Page 8: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/8.jpg)
Left Ventricle Contracts
• Aortic valve opens• Oxygen-rich blood• Blood enters
Aorta, which branches into the Ascending (Upper) Aorta and Descending (Lower) Aorta
RV
LA
LV
![Page 9: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/9.jpg)
Blood travels to all areas of the body
• Oxygen-rich blood
• Aorta branches into network of arteries and capillaries that supply each cell in the body with oxygen and nutrients
![Page 10: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/10.jpg)
Oxygen-rich blood enters body capillaries
• Oxygen is dropped off at body cells and carbon dioxide is absorbed
• Nutrients are dropped off and wastes are absorbed
• Blood becomes oxygen-poor
![Page 11: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/11.jpg)
Capillaries return blood to veins
• Oxygen-poor blood returns to veins
• Veins have series of valves to keep blood from flowing backwards
• Veins are often sandwiched between muscles that contract and squeeze the veins to keep blood moving
![Page 12: The Flow of Blood in the Human Circulatory System.](https://reader036.fdocuments.in/reader036/viewer/2022062301/56649f015503460f94c16fa0/html5/thumbnails/12.jpg)
Blood re-enters heart from body
• Oxygen-poor blood
• Enters right atrium
• Upper body – Superior (Upper) Vena Cava
• Lower Body – Inferior (Lower) Vena Cava
RA