NCERT Solutions Tissues for Class 9

NCERT Solutions for Class 9 Science Chapter 6 Tissues is an essential segment of the Class 9 Science syllabus and students must prepare it thoroughly to score well in the examinations. SimplyAcad has prepared the best NCERT solutions of Tissues to help them understand the concepts and ideas discussed. The study materials provide comprehensive answers to each question to ensure clarity and better understanding. Scroll below to avail the answers below.

 

 

Access theNCERT Solutions for Class 9 Science Chapter 6 Tissues

Exercise 1

Question 1. Name types of simple tissues.
Answer: The types of simple tissues are parenchyma, collenchyma, sclerenchyma and aerenchyma.

Question 2. Where is apical meristem found?
Answer: Apical meristem is found at the tip of root or shoot of the plant.

Question 3. Which tissue makes up the husk of coconut?
Answer: The husk of coconut is made of sclerenchymatous tissue.

Question 4. What are the constituents of phloem?
Answer: Phloem is made up of four types of elements sieve tube, companion cells, phloem fibres and phloem parenchyma.

Exercise 2

Question 1. Name the tissue responsible for movement in our body.
Answer: 1. Muscular tissue, 2. Nervous tissue, combination of both the tissues are responsible for movement in our body.

Question 2. What does a neuron look like? \textbf

{Solution:} A neuron consists of the following parts: \begin{itemize} \item \textbf{Cell Body:} This contains the nucleus and cytoplasm. It is the central part of the neuron. \item \textbf{Axon:} A long, thread-like extension that transmits impulses away from the cell body to other neurons or muscles. It is often covered by a myelin sheath that speeds up impulse transmission. \item \textbf{Dendrites:} Thread-like extensions of the cell body that receive nerve impulses from other neurons and transmit them toward the cell body. \end{itemize} The axon and dendrites work together to ensure the efficient transmission of nerve impulses throughout the nervous system. The axon carries signals away from the cell body, while the dendrites receive incoming signals. This coordinated function allows for rapid communication between different parts of the nervous system. \begin{center} % Drawing a basic neuron diagram

Question 3. Give three features of cardiac muscles.
Answer: Feature of cardiac muscles

(1) Heart muscles (cardiac muscles) are cylindrical, branched and uninucleated

(2) They are striated muscle fibres.

(3) They are involuntary muscles, cannot be controlled by us.

Question 4. What are the Junctions of areolar tissue?
Answer: Areolar tissue are connective tissues found in animal. It is found between skin and muscles, around blood vessels and nerves and in the bone marrow.

It fills the space inside the organs, supports internal organs and helps in the repair of tissues.

Exercise 3

Question 1. Define the term “tissue”.
Answer: Group of cells that are similar in structure and perform the same function is called a tissue.

Question 2. How many types of elements together make up the xylem tissue? Name them.
Answer: The xylem is made up of vessels, trachieds, xylem fibres and xylem parenchyma.

Question 3. How are simple tissues different from complex tissues in plants?
Answer: Simple tissues are made up of one type of cells which coordinate to perform a common function.

Complex tissues are made up of more than one type of cells. All these coordinate to perform a common function.

Question 4. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Answer: Parenchyma: The cells have thin cell walls made up of cellulose. Collenchyma: The cells have cell walls thickened at the comers due to pectin deposition.

Sclerenchyma: Their walls are thickened due to lignin deposition.

Question 5. What are the functions of stomata?
Answer: The outermost layer of the cell is called epidermis and is very porous. These pores are called stomata. These stomata help in transpiration and exchange of gases.

Question 6. Diagrammatically show the difference between the three types of muscle fibres.
Answer: Striated muscles

(1) They are connected to bones (Skeletal muscles).

(2) They are voluntary muscles.

(3) The cells are long, cylindrical with many nucleus and are unbranched.

Smooth muscles

(1) They are found in alimentary canal and lungs.

(2) They are involuntary muscles.

(3) They are spindle in shape and have single nucleus.

Cardiac muscles

(1) They are found in heart.

(2) They are involuntary in action.

(3) They are branched and have one nucleus.

Question 7. What is the specific function of the cardiac muscle?
Answer: (1) Cardiac muscles cells are cylindrical, branched and uninucleated.

(2) They are involuntary muscles.

(3) They show rhythmically contraction and relaxation throughout life.

(4) Their rhythmic contraction and relaxation helps in pumping action of heart.

Question 8. Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and location in the body.
Answer:

Question 9. Draw a labelled diagram of neuron.
Answer:

Question 10. Name the following:
(1) Tissue that forms the inner lining of our mouth.
(2) Tissue that connect muscle to bone in humans.
(3) Tissue that trar-carts food in plants.
(4) Tissue that siwea j’ut in our body.
(5) Connective tissue with a fluid matrix.
(6) Tissue present in the brain.
Answer: (1) Squamous epithelium (2) Tendons

(3) Phloem (4) Areolar tissue

(5) Blood (6) Nervous tissue

Question 11. Identify the type of tissue in the following: Skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Answer: (a) Skin—Striated squamous epithelium

(b) Bark of tree—Cork, protective tissue

(c) Bone—Connective tissue

(d) Lining of kidney tubule—Cuboidal epithelium tisse

(e) Vascular bundle—Conducting tissue

Question 12. Name the regions in which parenchyma tissue is present.
Answer: In the pith of the roots and stems. When it contains chlorophyll, it is called chlorenchyma, found in green leaves. In aquatic plants, parenchyma contains large air cavities and help them to float. Such type of parenchyma is called aerenchyma.

Question 13. What is the role of epidermis in plants?
Answer: Cells of epidermis forms a continuous layer without intercellular spaces. It protects all the parts of plants.

Question 14. How does the cork act as a protective tissue?
Answer: Cork acts as a protective tissue because its cells are dead and compactly arranged without intercellular spaces. They have deposition of suberin on the walls that make them impervious to gases and water.

Question 15. Complete the table:

Answer: