Science · Class 7
Transportation in Animals and Plants
Circulatory and excretory systems; transport in plants via xylem and phloem.
4 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Animals transport food, oxygen, and waste through blood and vessels. Plants transport water and minerals (xylem) and food (phloem). This chapter covers heart, blood, and plant vascular tissues.
Transport in Animals
- Heart pumps blood; four chambers in humans
- Arteries carry blood away; veins return blood; capillaries exchange materials
- Blood: plasma, RBC (haemoglobin carries O₂), WBC (immunity), platelets (clotting)
- Double circulation in mammals
Transport in Plants
- Xylem: water and minerals upward from roots — transpiration pull
- Phloem: food (sucrose) from leaves to all parts — translocation
- Root hairs absorb water by osmosis
Excretion Link
- Kidneys filter urea from blood; sweat removes salts and water
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Blood components
What is the function of haemoglobin?
- 1Red pigment in RBC
- 2Binds and transports oxygen
- 3Gives blood red colour
Answer
Oxygen transport in blood
Wilting
Why do plants wilt on hot dry days?
- 1Transpiration exceeds water uptake
- 2Cells lose turgor
- 3Xylem cannot replenish fast enough
Answer
Excessive water loss through leaves
Key Points to Remember
- ✓ Pulse rate increases after exercise
- ✓ Stethoscope hears heartbeat
- ✓ Ringing a tree damages phloem — sweet sap leaks
Exam Tips
- • Draw human heart with four chambers
- • Distinguish xylem and phloem
- • Name blood components and functions
Practice MCQs — Transportation in Animals and Plants
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
Xylem transports: