Скачать или смотреть BODY FLUIDS AND CIRCULATION CLASS 11 | CIRCULATORY SYSTEM | LECTURE - 10 | NEET 2026,NEET 2027

This video is a detailed lecture on "Blood" for Class 11 students, covering its composition, characteristics, and functions.
Here's a summary of the video's content:
Introduction to Blood [00:00]: The lecture introduces blood as a specialized connective tissue with a volume of 5-5.5 liters, mesodermal origin, and a slightly alkaline pH of 7.4.
Composition of Blood [03:22]: Blood is composed of 55% plasma and 45% formed elements.
Plasma Breakdown (55%):
Water: 90-92% [05:14]
Proteins: 6-8% (Albumin for osmotic balance [07:19], Globulin for defense [07:25], Fibrinogen for clotting [07:30]) [05:27]
Electrolytes: (e.g., Sodium, Potassium, Magnesium, Calcium, Bicarbonate, Chloride) [05:37]
Other Substances: (e.g., Heparin, Amino Acids, Cholesterol, Glucose) [06:33]
Formed Elements Breakdown (45%) [10:35]:
RBC (Red Blood Cells) / Erythrocytes: 5-5.5 million/mm³, 7.5 µm size, 120-day lifespan, transports gases [12:17].
WBC (White Blood Cells) / Leukocytes: 6000-8000/mm³, 8-20 µm size, 10 hours to a few days lifespan, protects from infections [12:30].
Platelets / Thrombocytes: 1.5-3.5 lakh/mm³, 2-3 µm size, 3-5 days lifespan, aids in blood clotting [12:43]

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