🌱 What are Tissues?
A tissue is a group of similar cells working together to perform a specific function.
👉 In multicellular organisms, cells don’t work alone — they organize into tissues for efficiency.
🔬 Why are Tissues Important?
- Improve efficiency of work
- Enable division of labour
- Help in forming organs and organ systems
- Allow organisms to perform complex functions
🌿 Plant Tissues
Plant tissues are mainly divided into two types:
1. Meristematic Tissue (Growing Tissue)
These tissues contain actively dividing cells.
🔹 Types:
- Apical Meristem → Found at tips (root & shoot), helps in length growth
- Intercalary Meristem → Found at nodes, helps in regrowth
- Lateral Meristem → Helps in increase in thickness
🔹 Features:
- Cells divide continuously
- Small, dense cytoplasm
- No vacuole or very small
2. Permanent Tissue
Cells that have lost the ability to divide and perform specific functions.
🔹 Types:
(A) Simple Permanent Tissue
Made of one type of cells
- Parenchyma
- Living cells
- Store food, help in photosynthesis
- Collenchyma
- Provide flexibility
- Found in stems and leaves
- Sclerenchyma
- Dead cells
- Provide strength (e.g., coconut husk)
(B) Complex Permanent Tissue
Made of different types of cells
- Xylem
- Transports water and minerals
- Mostly dead cells
- Phloem
- Transports food
- Living cells
🧍 Animal Tissues
Animal tissues are more specialized and are of four main types:
1. Epithelial Tissue (Covering Tissue)
- Covers body surfaces and organs
- Protects, absorbs, and secretes
Types:
- Squamous (thin)
- Cuboidal (cube-shaped)
- Columnar (tall cells)
- Ciliated (movement with cilia)
2. Connective Tissue
- Connects and supports body parts
Examples:
- Blood → transports substances
- Bone → provides structure
- Cartilage → flexible support
- Areolar tissue → fills spaces
3. Muscular Tissue
- Responsible for movement
Types:
- Skeletal muscle → voluntary
- Smooth muscle → involuntary
- Cardiac muscle → heart muscle
4. Nervous Tissue
- Controls and coordinates body functions
- Made of neurons
👉 Carries messages through electrical signals
⚖️ Plant vs Animal Tissues (Quick Difference)
| Feature | Plant Tissue | Animal Tissue |
|---|---|---|
| Growth | Continuous | Limited |
| Support | Mostly dead cells | Mostly living cells |
| Movement | Absent | Present |
| Complexity | Simpler | More complex |
MCQs – Tissues in Action
🟢 Basic Level
1. A group of similar cells performing a specific function is called:
A) Organ
B) Tissue
C) System
D) Cell
✅ Answer: B
2. Which tissue is responsible for growth in plants?
A) Permanent tissue
B) Meristematic tissue
C) Xylem
D) Phloem
✅ Answer: B
3. Which tissue transports water in plants?
A) Phloem
B) Xylem
C) Parenchyma
D) Collenchyma
✅ Answer: B
4. Which of the following is a living plant tissue?
A) Sclerenchyma
B) Xylem
C) Parenchyma
D) Cork
✅ Answer: C
5. Which tissue provides flexibility to plants?
A) Sclerenchyma
B) Collenchyma
C) Xylem
D) Phloem
✅ Answer: B
🟡 Moderate Level
6. Apical meristem is found at:
A) Leaves
B) Roots and shoots tips
C) Stem center
D) Flowers
✅ Answer: B
7. Which tissue helps in transport of food in plants?
A) Xylem
B) Phloem
C) Collenchyma
D) Parenchyma
✅ Answer: B
8. Which animal tissue covers body surfaces?
A) Muscular
B) Nervous
C) Epithelial
D) Connective
✅ Answer: C
9. Blood is a type of:
A) Muscular tissue
B) Connective tissue
C) Nervous tissue
D) Epithelial tissue
✅ Answer: B
10. Which muscle is involuntary?
A) Skeletal
B) Smooth
C) Both A and B
D) None
✅ Answer: B
🔴 Higher Level
11. Which plant tissue is made of dead cells?
A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Meristem
✅ Answer: C
12. Which tissue forms the lining of organs?
A) Nervous
B) Epithelial
C) Connective
D) Muscular
✅ Answer: B
13. Neurons are found in:
A) Muscular tissue
B) Nervous tissue
C) Connective tissue
D) Epithelial tissue
✅ Answer: B
14. Which tissue helps in movement of body parts?
A) Epithelial
B) Connective
C) Muscular
D) Nervous
✅ Answer: C
15. Which tissue connects different parts of the body?
A) Epithelial
B) Connective
C) Nervous
D) Muscular
✅ Answer: B
⚡ Assertion–Reason Type
16. Assertion: Xylem transports water.
Reason: Xylem is made of living cells.
A) Both true
B) Both false
C) A true, R false
D) A false, R true
✅ Answer: C
17. Assertion: Muscles help in movement.
Reason: Muscles can contract and relax.
A) Both true and correct explanation
B) Both true but not related
C) A true, R false
D) Both false
✅ Answer: A
🎯 Case-Based
18. A plant shows increase in height due to cell division at tips. Which tissue is responsible?
A) Lateral meristem
B) Apical meristem
C) Permanent tissue
D) Phloem
✅ Answer: B
19. A person suffers injury affecting signal transmission. Which tissue is damaged?
A) Epithelial
B) Nervous
C) Muscular
D) Connective
✅ Answer: B
🧠 Concept-Based
20. Which tissue has no intercellular space?
A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Meristematic tissue
✅ Answer: D
21. Which tissue stores food in plants?
A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Xylem
✅ Answer: A
22. Cardiac muscles are found in:
A) Brain
B) Heart
C) Bones
D) Skin
✅ Answer: B
23. Which tissue is responsible for coordination?
A) Muscular
B) Nervous
C) Connective
D) Epithelial
✅ Answer: B
📌 Exam Booster
24. Which is NOT a plant tissue?
A) Xylem
B) Phloem
C) Neuron
D) Parenchyma
✅ Answer: C
25. Which tissue is dead and provides strength?
A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Phloem
✅ Answer: C
Fill in the Blanks (Compact)
- Group of similar cells = Tissue
- Growth tissue in plants = Meristematic
- Tip of root/shoot meristem = Apical
- Thickness increase = Lateral meristem
- Food storage plant tissue = Parenchyma
- Flexibility in plants = Collenchyma
- Strength-providing dead tissue = Sclerenchyma
- Water transport tissue = Xylem
- Food transport tissue = Phloem
- Body covering tissue = Epithelial
- Connective tissue example (fluid) = Blood
- Bone & cartilage = Connective tissue
- Movement tissue = Muscular
- Heart muscle = Cardiac
- Muscle of voluntary movement = Skeletal
- Involuntary muscle in organs = Smooth
- Nervous tissue cell = Neuron
- Space between meristem cells = None / No intercellular space
- Plant tissues type = Meristematic & Permanent
- Permanent tissue types = Simple & Complex
- Xylem cells mostly = Dead
- Phloem transports = Food
- Body coordination tissue = Nervous
- Tissue function = Division of labour