Body Fluids and Circulation — Class 11 Bio-Zoology (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 11 Bio-Zoology, Chapter 7. Blood, lymph, cardiac cycle and blood pressure.
1. About this chapter
This chapter covers Body Fluids and Circulation as part of the Class 11 Samacheer Kalvi Bio-Zoology curriculum. It deals with blood, lymph, cardiac cycle and blood pressure and builds conceptual understanding essential for the TN HSC Public Exam.
By the end of this chapter, students will be able to:
- Describe composition of blood and lymph
- Explain the cardiac cycle and ECG
2. Key concepts
- Concept 1: Describe composition of blood and lymph.
- Concept 2: Explain the cardiac cycle and ECG.
3. Important terms and formulas
| Term / Formula | Description |
|---|---|
| Describe composition of blood… | Describe composition of blood and lymph |
| Explain the cardiac cycle… | Explain the cardiac cycle and ECG |
4. Worked examples
Example 1. Applying a key concept from this chapter.
Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.
Example 2. A typical exam-style question on body fluids and circulation.
Solution: Break the problem into steps, use the appropriate formula and verify the answer.
5. Common mistakes
- Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
- Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.
6. Practice (exam-style)
- Define the main term or principle covered in Chapter 7.
- Give two real-life examples related to body fluids and circulation.
- Solve a short numerical or descriptive question from this chapter.
- State one important formula and explain each symbol.
7. Answer key (hints)
- Refer to section 2 (Key concepts) above for the definition.
- Examples should be drawn from daily experience and local context.
- Apply the formula from section 3, show all steps clearly.
- Formula with units — refer to the textbook glossary for symbol meanings.
8. Quick revision
- Class 11 Bio-Zoology — Chapter 7: Body Fluids and Circulation.
- Core idea: Blood, lymph, cardiac cycle and blood pressure.
- Key outcomes: Describe composition of blood and lymph; Explain the cardiac cycle and ECG.
- Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.
