NCERT Science Class 9 Chapter 6 Question Answer Solutions – Tissues FREE PDF Download 2025-26
Page – 61
Q. 1. What is a tissue?
Answer:-
A tissue is a group of similar cells that work together to perform a specific function in an organism. 🧫✨
Q. 2. What is the utility of tissues in multi-cellular organisms?
Answer:-
Utility of Tissues in Multi-cellular Organisms 🧬✨
Tissues play a crucial role in the functioning of multi-cellular organisms. Their utility includes:
🔹 Division of Labor – Different tissues perform specialized functions, making the organism more efficient.
🔹 Structural Support – Tissues provide shape, strength, and support to the body.
🔹 Growth & Repair – Damaged tissues can regenerate, ensuring the organism’s survival.
🔹 Transportation – Certain tissues like blood (in animals) and xylem/phloem (in plants) help in transport of nutrients.
🔹 Coordination – Nervous tissues help in communication and coordination between different body parts.
Page – 65
Q. 1. Name types of simple tissues.
Answer:-
Types of Simple Tissues 🌱✨
Simple tissues in plants are made up of similar cells performing a common function. They are classified into three types:
1️⃣ Parenchyma – Soft and flexible tissue responsible for storing food and providing support. Some parenchyma cells also help in photosynthesis (called chlorenchyma) or buoyancy (called aerenchyma). 🌿💡
2️⃣ Collenchyma – Provides mechanical support and flexibility to growing parts of the plant like stems and leaves. These cells have unevenly thickened walls. 🍃🔗
3️⃣ Sclerenchyma – The hardest tissue that gives strength and rigidity to plant parts. The cells have thick walls and are usually dead at maturity. Examples: fibers in jute, husk of coconut. 🏋️♂️🌰
Q. 2. Where is apical meristem found?
Answer:-
Location of Apical Meristem 🌱✨
Apical meristem is found at:
🔹 Tips of Roots – Helps in root elongation and penetration into the soil.
🔹 Tips of Stems – Enables upward growth of the plant and formation of new branches.
These meristematic tissues are responsible for primary growth, making plants taller and roots deeper! 🚀🌿
Q. 3. Which tissue makes up the husk of coconut?
Answer:-
Tissue in Coconut Husk 🌰✨
The husk of a coconut is made up of sclerenchyma tissue.
🔹 Function: It provides strength and rigidity to the plant.
🔹 Cell Structure: The cells have thick, lignified walls and are dead at maturity.
🔹 Example: Coconut fibers (coir) are commonly used in making ropes, mats, and brushes due to their toughness! 🏋️♂️🌿
Q. 4. What are the constituents of phloem?
Answer:-
Constituents of Phloem 🌿✨
Phloem is a complex permanent tissue responsible for transporting food in plants. It consists of four main components:
🔹 Sieve Tubes – Long, tube-like structures that help in transporting food. 🍽️
🔹 Companion Cells – Provide energy and support to sieve tubes for efficient transport. ⚡
🔹 Phloem Fibers – Provide strength and support to the tissue. 🏋️♂️
🔹 Phloem Parenchyma – Helps in storage and lateral transport of food. 🥗
Together, these elements ensure the proper distribution of nutrients throughout the plant! 🌱🚀
Page – 69
Q. 1. Name the tissue responsible for movement in our body.
Answer:-
Tissue Responsible for Movement in Our Body 🏃♂️✨
The muscular tissue is responsible for movement in our body. It consists of three types:
🔹 Skeletal Muscle – Helps in voluntary movements like walking and running. 🏋️♂️
🔹 Smooth Muscle – Found in internal organs and responsible for involuntary movements like digestion. 🍽️
🔹 Cardiac Muscle – Makes up the heart and enables continuous beating. ❤️
These muscles work together to keep our body active and functional! 🚀😊
Q. 2. What does a neuron look like?
Answer:-
Structure of a Neuron 🧠✨
A neuron is the basic unit of the nervous system and has a unique shape to transmit messages efficiently. It consists of:
🔹 Cell Body (Cyton) – Contains the nucleus and other organelles, maintaining the neuron’s functions. ⚡
🔹 Dendrites – Branch-like structures that receive signals from other neurons. 🌿
🔹 Axon – A long, thin fiber that carries electrical impulses away from the cell body. 🚀
🔹 Axon Terminals – Endings of the axon that transmit signals to the next neuron or muscle. 🔗
The neuron looks like a star-shaped cell with long extensions, allowing quick communication in the body! 🌟🔬
Simple Description of a Neuron Diagram 🧠✨
A neuron looks like a star-shaped cell with long extensions. Here’s a simple way to visualize it:
🟢 Cell Body (Cyton) – A round or star-shaped structure containing the nucleus.
🌿 Dendrites – Small, branch-like structures emerging from the cell body, receiving signals.
➖ Axon – A long, thin fiber extending from the cell body, transmitting impulses.
🔗 Axon Terminals – End points of the axon that send messages to the next neuron.
Imagine a tree where the cell body is the trunk, the dendrites are branches receiving signals, and the axon is the main pathway sending messages—helping in communication across the body! 🌳⚡
Q. 3. Give three features of cardiac muscles.
Answer:-
Features of Cardiac Muscles ❤️✨
Cardiac muscles are special involuntary muscles found in the heart. Here are three key features:
🔹 Striated but Involuntary – They have a striped appearance like skeletal muscles but work automatically without conscious control. ⚡
🔹 Branched Structure – The muscle fibers are branched, helping in the strong and coordinated contraction of the heart. 🔗
🔹 Never Fatigue – Unlike other muscles, cardiac muscles work continuously throughout life without getting tired! 💪
These features ensure that the heart keeps beating efficiently, pumping blood throughout the body! 🏃♂️❤️
Q. 4. What are the functions of areolar Q tissue?
Answer:-
Functions of Areolar Tissue 🏋️♂️✨
Areolar tissue is a type of connective tissue that plays a vital role in the body. Its functions include:
🔹 Binding Organs Together – It connects skin to muscles and fills spaces between organs. 🏗️
🔹 Support & Strength – Provides flexibility and cushioning to body structures. 💪
🔹 Repair & Healing – Helps in wound healing by assisting in tissue repair. 🩹
🔹 Immune Defense – Contains white blood cells that fight infections. 🛡️
This tissue is widely distributed in the body and ensures proper structure and protection! 🚀😊
Excercies Back Question and Answer
Q. 1. Define the term “tissue”.
Answer:-
Definition of Tissue 🧫✨
A tissue is a group of similar cells that work together to perform a specific function in an organism.
Q. 2. How many types of elements together make up the xylem tissue? Name them.
Answer:-
Elements of Xylem Tissue 🌿✨
The xylem tissue consists of four types of elements that work together to transport water and minerals in plants. These are:
1️⃣ Tracheids – Long, tube-like cells that help in water conduction and provide structural support. 🚰🌱
2️⃣ Vessels – Wider and more efficient structures for water transport, forming long continuous tubes. 💧🔗
3️⃣ Xylem Fibers – Thick-walled fibers that add strength to the plant. 🏋️♂️
4️⃣ Xylem Parenchyma – Stores nutrients and helps in lateral transport of water. 🍃
These elements ensure efficient transport of water and minerals from roots to other parts of the plant! 🚀🌿
Q. 3. How are simple tissues different from complex tissues in plants?
Answer:-
Difference Between Simple and Complex Tissues 🌿✨
| Feature | Simple Tissues 🪴 | Complex Tissues 🌱 |
|---|---|---|
| Composition | Made up of only one type of cell. | Made up of more than one type of cell. |
| Function | Performs a single function like support, storage, or photosynthesis. | Performs a combined function like transport of water and nutrients. |
| Types | Parenchyma, Collenchyma, Sclerenchyma. | Xylem (Tracheids, Vessels, Xylem Fibers, Xylem Parenchyma) & Phloem (Sieve Tubes, Companion Cells, Phloem Fibers, Phloem Parenchyma). |
| Example | Found in soft parts of plants like leaves and stems. | Found in vascular tissues that help in transportation. |
Simple tissues ensure the basic structure of the plant, while complex tissues are responsible for transporting water and food! 🚀🌿
Q. 4. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Answer:-
Difference Based on Cell Wall Structure 🌿✨
| Feature | Parenchyma 🟢 | Collenchyma 🟡 | Sclerenchyma 🔴 |
|---|---|---|---|
| Cell Wall Type | Thin and flexible primary cell wall. | Irregularly thickened primary cell wall at corners. | Thick, lignified secondary cell wall. |
| Composition | Made of cellulose. | Made of pectin & cellulose, providing flexibility. | Made of lignin, making it hard and rigid. |
| Function | Helps in storage, photosynthesis, and buoyancy. | Provides mechanical support & flexibility to growing parts. | Gives strength and rigidity to the plant. |
| Nature of Cells | Living cells. | Living cells. | Dead cells at maturity. |
Parenchyma is soft and used for storage, collenchyma provides flexible support, and sclerenchyma gives strength to plants! 🚀🌱
Q. 5. What are the functions of the stomata?
Answer:-
Functions of Stomata 🌱✨
Stomata are tiny pores found on the surface of leaves and help plants in several important ways:
🔹 Gas Exchange – Stomata allow the exchange of oxygen and carbon dioxide for photosynthesis and respiration. 🌿💨
🔹 Transpiration – Water vapor escapes through stomata, cooling the plant and maintaining the water cycle. 🚰🔥
🔹 Regulation of Water – By opening and closing, stomata help control water loss, preventing dehydration. 💧🛡️
🔹 Absorption of CO₂ – They take in carbon dioxide, which is essential for making food during photosynthesis. ☀️🍃
Thus, stomata play a key role in keeping the plant healthy and functional! 🚀😊
Q. 6. Diagrammatically show the difference between the three types of muscle fibres.
Answer:-
Q. 7. What is the specific function of the cardiac muscle?
Answer:-
Function of Cardiac Muscle ❤️✨
Cardiac muscle is a specialized involuntary muscle found only in the heart. Its specific function is:
🔹 Pumping Blood – Cardiac muscles contract continuously and rhythmically to pump blood throughout the body. 🩸💓
🔹 Generating Heartbeat – These muscles never fatigue and work nonstop to maintain circulation. ⚡🛡️
🔹 Coordinated Contractions – The branched fibers allow synchronized contractions, ensuring efficient blood flow. 🔗🚀
This muscle keeps the heart beating for life without voluntary control! 🏃♂️❤️
Q. 8. Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.
Answer:-
Difference Between Striated, Unstriated, and Cardiac Muscles 🏋️♂️💓
| Feature | Striated Muscles 💪 (Skeletal) | Unstriated Muscles 🩺 (Smooth) | Cardiac Muscles ❤️ (Heart) |
|---|---|---|---|
| Structure | Long, cylindrical, multinucleated, with light & dark bands (striations). | Spindle-shaped, uninucleated, no striations. | Branched, uninucleated, striated, interconnected fibers. |
| Control | Voluntary – Can be controlled consciously (e.g., movement). | Involuntary – Works automatically (e.g., digestion). | Involuntary – Pumps blood continuously. |
| Location | Attached to bones, helps in movement. | Found in internal organs like stomach, intestines, and blood vessels. | Found only in the heart, enabling heartbeat. |
| Function | Helps in body movement and posture. | Allows slow, sustained contractions in organs. | Ensures continuous pumping of blood. |
Striated muscles help in movement, unstriated muscles work in organs, and cardiac muscles keep the heart beating for life! 🚀💓
Q. 9. Draw a labelled diagram of a neuron.
Answer:-
Q. 10. Name the following.
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that connects muscle to bone in humans.
(c) Tissue that transports food in plants.
(d) Tissue that stores fat in our body.
(e) Connective tissue with a fluid matrix.
(f) Tissue present in the brain.
Answer:-
Answers to the Given Questions 🧬✨
(a) Epithelial Tissue – Forms the inner lining of our mouth. 🏗️
(b) Tendon – Connects muscle to bone in humans. 🔗💪
(c) Phloem – Transports food in plants. 🍃🚀
(d) Adipose Tissue – Stores fat in our body. 🛡️💧
(e) Blood – Connective tissue with a fluid matrix. 🩸⚡
(f) Nervous Tissue – Present in the brain, responsible for transmitting signals. 🧠💡
Q. 11. Identify the type of tissue in the following: skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Answer:-
Identification of Tissue Types 🏗️🌿
Here are the types of tissues for each structure:
🔹 Skin – Epithelial Tissue (Protects the body, acts as a barrier) 🛡️
🔹 Bark of Tree – Cork (Protective Tissue) (Prevents water loss, protects plant) 🌳
🔹 Bone – Connective Tissue (Provides support and structure) 🏋️♂️
🔹 Lining of Kidney Tubule – Cuboidal Epithelial Tissue (Helps in absorption and filtration) 🩺
🔹 Vascular Bundle – Complex Tissue (Xylem & Phloem) (Transports water and nutrients in plants) 🌱
These tissues play essential roles in support, protection, transport, and absorption! 🚀✨
Q. 12. Name the regions in which parenchyma tissue is present.
Answer:-
Regions Where Parenchyma Tissue is Found 🌱✨
Parenchyma tissue is widely distributed in plants and is found in the following regions:
🔹 Leaves – Forms the mesophyll tissue, helping in photosynthesis. 🍃☀️
🔹 Stem – Present in the cortex and pith, providing storage and support. 🌿🏗️
🔹 Roots – Found in the cortex, helping in storage and transport of nutrients. 🚰🛡️
🔹 Fruit & Seeds – Helps in storing nutrients and maintaining food reserves. 🍎🌰
🔹 Xylem & Phloem – Xylem parenchyma aids in lateral transport of water; Phloem parenchyma stores and transports food. 💧🍃
These regions ensure essential functions like photosynthesis, storage, transport, and support, making parenchyma a vital tissue for plant survival! 🚀🌱
Q. 13. What is the role of epidermis in plants?
Answer:-
Role of Epidermis in Plants 🌱✨
The epidermis is the outermost protective layer of a plant, playing several crucial roles:
🔹 Protection – Acts as a barrier against mechanical injury, harmful microorganisms, and excessive water loss. 🛡️
🔹 Prevention of Water Loss – The epidermal cells secrete a waxy cuticle, reducing evaporation and conserving water. 💧❄️
🔹 Gas Exchange – Contains stomata, which regulate the entry of carbon dioxide and the exit of oxygen for photosynthesis. 🍃☀️
🔹 Absorption of Water – In roots, epidermal cells form root hairs, increasing surface area for water absorption. 🌊🌱
🔹 Transpiration – Facilitates the evaporation of water, creating a pull that helps transport nutrients within the plant. 🚰🔥
Thus, the epidermis ensures survival, efficient water management, and proper exchange of gases, making it an essential tissue for plant health! 🚀🌿
Q. 14. How does the cork act as a protective tissue?
Answer:-
Cork as a Protective Tissue 🌳✨
Cork, also known as phellem, is a protective tissue that replaces the epidermis in older plant stems and roots. It plays a crucial role in safeguarding the plant in the following ways:
🔹 Prevents Water Loss – Cork cells are impermeable to water due to the presence of suberin, reducing dehydration. 💧🛡️
🔹 Protects Against Injuries – Forms a tough outer layer, preventing mechanical damage to the plant. ⚔️
🔹 Defense Against Microbes – Acts as a barrier, blocking the entry of harmful microorganisms like bacteria and fungi. 🦠🚫
🔹 Insulation – Provides thermal protection, shielding the plant from extreme temperatures. 🌡️❄️
🔹 Gas Exchange – Contains small pores called lenticels, allowing controlled exchange of gases. 🌬️
Thus, cork ensures survival by protecting plants from water loss, infections, and environmental damage! 🚀🌿
Q. 15. Complete the following chart:
Answer:-
Here’s the completed chart showing the classification of permanent tissues in plants:
Permanent Tissue 🌱✨
🔹 Simple Tissues
- Parenchyma – Helps in storage, photosynthesis, and buoyancy. 🌿💡
- Collenchyma – Provides mechanical support and flexibility. 🍃🔗
- Sclerenchyma – Gives strength and rigidity to plant structures. 🏋️♂️🌰
🔹 Complex Tissues
- Xylem – Transports water and minerals from roots to other parts of the plant. 💧🌱
- Phloem – Transports food made during photosynthesis to different plant parts. 🍃🚀
This classification helps in understanding the functions and types of permanent tissues in plants! 🚀✨