Subject: General Science
Book: NCERT Science Class 7
Transport of substances occurs in animals and plants through specialized systems.
- **Circulatory System in Humans**:
- Blood transports oxygen, nutrients, and waste.
- The heart pumps blood through arteries and veins.
- **Excretion in Animals**:
- The kidneys filter blood and remove waste as urine.
- **Transport in Plants**:
- Xylem: Carries water from roots to leaves.
- Phloem: Transports food from leaves to other parts.
**Possible Exam Questions:**
1. Explain the structure and function of the human circulatory system.
2. What is the role of xylem and phloem in plants?
3. How does the kidney help in excretion?
4. Describe the role of blood in transportation.
5. What is the difference between arteries and veins?
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