Transportation in Animals and Plants Class 7 Extra Questions for Exam Success

Understanding Transportation in Animals and Plants

Transportation is the process by which substances like nutrients, gases, and water move within living organisms. In Class 7 NCERT Science, this chapter explains how animals and plants transport essential materials to sustain life.

In animals, transportation mainly involves the circulatory system, which includes the heart, blood, and blood vessels. This system carries oxygen, nutrients, and waste products to and from cells.

In plants, transportation occurs through specialized tissues called xylem and phloem. Xylem transports water and minerals from roots to leaves, while phloem distributes food made in the leaves to other parts of the plant.

Understanding these processes is crucial for Class 7 students to grasp how living beings maintain their internal balance and survive.

The Circulatory System in Animals: Key Components and Functions

The circulatory system in animals is vital for transporting oxygen, nutrients, hormones, and waste products. It consists of:

• Heart: A muscular organ that pumps blood.
• Blood: Carries oxygen, nutrients, and wastes.
• Blood Vessels: Arteries, veins, and capillaries that transport blood.

How It Works:

• The heart pumps oxygen-rich blood through arteries to body cells.
• Cells use oxygen and nutrients, producing carbon dioxide and wastes.
• Blood returns to the heart through veins carrying these wastes.

Example:

If the heart pumps $70$ ml of blood per beat and beats $75$ times per minute, the volume pumped per minute is:

$$70 \times 75 = 5250 \text{ ml} = 5.25 \text{ litres}$$

This shows how efficiently the heart circulates blood to meet the body's needs.

Transportation in Plants: Role of Xylem and Phloem

Plants transport water, minerals, and food through two main tissues:

• Xylem: Transports water and minerals from roots to leaves.
• Phloem: Transports food (glucose) from leaves to other parts.

Xylem Transport:

Water moves upward due to root pressure and transpiration pull.

Phloem Transport:

Food moves from leaves (source) to roots, stems, and fruits (sink).

Comparison Table:

Understanding these helps Class 7 students learn how plants survive and grow.

Common Extra Questions for Class 7 NCERT Transportation Chapter

Practicing extra questions helps reinforce concepts and prepares students for exams. Here are some important extra questions:

• What is the function of the heart in animals?
• How does water move from roots to leaves?
• Name the components of blood.
• Differentiate between xylem and phloem.
• Explain how oxygen is transported in the blood.

Worked Example:

Q: What type of blood vessels carry blood away from the heart?

A: Arteries carry blood away from the heart to various body parts.

Attempting such questions improves understanding and exam readiness.

Tips to Master Transportation in Animals and Plants for Class 7 Exams

To excel in the transportation chapter, follow these tips:

• Understand Concepts: Focus on how and why transportation occurs.
• Use Diagrams: Label heart, blood vessels, xylem, and phloem.
• Practice Questions: Solve NCERT and extra questions regularly.
• Revise Definitions: Know key terms like circulation, transpiration, and phloem.
• Compare Systems: Learn differences between animal and plant transportation.

Consistent revision and practice will boost your confidence and scores.