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Circulatory System of Man

ICSE · Class 10 · Biology

Quick revision notes for Circulatory System of Man — ICSE Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.

43 questions24 flashcards5 concepts

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A labeled diagram of a human red blood cell, highlighting its biconcave shape and the absence of a nucleus.
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Key Topics to Revise

1

Body Fluids and Types of Circulatory Systems

  • Body fluid is distributed in two compartments: Extracellular Fluid (ECF) - 25% of body weight, high Na+ concentration; Intracellular Fluid (ICF) - 67% of body weight, high K+ concentration
  • ECF includes interstitial fluid, blood plasma, lymph, and non-circulating fluids
  • Open circulatory system: No capillaries, arteries open into blood sinuses (found in arthropods, molluscs)
2

Blood Composition and Properties

  • Blood volume: 4.5-5.5L (women), 5-6L (men); pH 7.4 (slightly alkaline); specific gravity 1.05-1.06
  • Bright red when oxygenated (arteries), dull red when deoxygenated (veins)
  • Plasma (55%): 92% water, 8% solids including proteins (albumin, globulin, fibrinogen, prothrombin)
3

Red Blood Cells (RBCs/Erythrocytes)

  • Biconcave discs, 8μm diameter, 2μm thickness; enucleated in mammals
  • RBC count: 5 million/mm³ (males), 4.5 million/mm³ (females)
  • Contains hemoglobin (15g/100ml blood) with iron-containing heme + globin protein
4

White Blood Cells (WBCs/Leukocytes)

  • Colorless, nucleated, amoeboid cells; 6,000-8,000/mm³ normal count
  • Can perform diapedesis (squeezing through capillary walls) and phagocytosis
  • Granulocytes: Neutrophils (50-70%), Eosinophils (1-5%), Basophils (0-1%)

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Full Notes

Key Concepts

Body fluids are divided into twoBlood is a fluid connective tissueBiconcaveNucleatedProcess involving conversion of prothrombin

Frequently Asked Questions

What are the important topics in Circulatory System of Man for ICSE Class 10 Biology?
Circulatory System of Man covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Circulatory System of Man — ICSE Class 10 Biology?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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