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Circulatory system
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- 2. Definition It isa fluid-filled network of tubes (or vessels) through which materials move between the environment and the cells of a multicellular animal.
- 3. Characteristics It connectsall parts of an organism in a way that allows individual cells to thrive as well as for organisms to function as a unit It is an entirely closed system
- 4. Function Transport materialsneeded by cells Oxygen Glucose Remove waste materials from cells Carbon dioxide urea
- 5. Major Components Pump(heart) Continuously circulates blood Network of tubes Arteries- blood away from heart Veins- blood back to the heart Blood Fluid that fills the circulatory system
- 6. Accessory Organs Lungs-organ where oxygen is taken up and CO2 is released Kidneys- organ where wastes are removed from blood; critical in regulating fluids in the body Small intestine- digestion Large intestine- water absorption
- 7. BLOOD 1. PLASMA- 55-60%OF BLOOD 2. CELLULAR COMPONENTS- 40-45% RED BLOOD CELLS – ERYTHROCYTES WHITE BLOOD CELLS- LEUKOCYTES PLATELETS-THROMBOCYTES
- 8. PLASMA ALKALINE LIQUID PALE COLORED INORGANICSALTS(1%) GLUCOSE ,AMINO ACIDS FIBRINOGEN,HORMONES(7-8%) 90-92% WATER
- 9. RED BLOOD CELLS No nucleus 120 days life More room for haemoglobin Biconcave in shape size about 7 micron
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- 17. ABO BLOOD GROUPSYSTEM
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- 24. The Heart Thehuman heart has four chambers Left and right ventricle Left and right atrium The left side of the heart pumps oxygenated blood to the body while the right side of the heart pumps deoxygenated blood to the lungs where oxygen can be absorbed by the hemoglobin carrying red blood cells
- 27. Specific parts Pulmonaryarteries- transport blood to lungs Pulmonary veins- transport oxygenated blood to hear Aortic arch and trunk- main arteries from heart Common carotid artery- carries blood to brain Renal vein and artery- connects to kidneys Mesenteric veins- connects to intestine
- 30. Deoxygenated blood returnsfrom the rest of the body through the superior and inferior vena cava.
- 31. The right atriumreceives the deoxygenated blood.
- 32. Blood then entersthe right ventricle through the tricuspid valve.
- 33. To lungs Contraction ofthe right ventricle pushes blood through the pulmonary semilunar valve into the pulmonary arteries in which it travels to the lungs.
- 34. From lungs After passingthrough the capillaries of the lungs, the blood which is now oxygenated returns to the heart in the pulmonary veins.
- 35. The left atriumreceives blood from the pulmonary vein.
- 36. Blood passes throughthe mitral valve into the left ventricle.
- 37. To rest of body Contractionof the left ventricle pushes blood through the aortic semilunar valve into the aorta. Blood travels to all regions of the body where it feeds cells with oxygen picked up from the lungs and nutrients from the digestive tract.
- 39. DOUBLE CIRCULATION PULMONARY CIRCULATION-Heartto the lungs and back to the heart. SYSTEMIC CIRCULATION- heart to body parts and back to the heart
- 40. Heart beat Pulse Cardiac cycle-systole & diastole Hepatic portal system Lymph & lymphatic system Tissue fluid
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- 42. Blood Pressure Bloodpressure is a measure of the force exerted by the blood on the wall of the arteries. An example is 120/80 (systolic pressure/diastolic pressure. Systolic pressure is the result of the contraction of the ventricles (normal 110-140) Diastolic pressure is during the ventricle relaxation (normal 70-90)
- 43. Thank you andhappy learning. Stay safe all of you. --Dr. Gurminder Rawal