NCERT 9th Class (CBSE) Science: Tissues

Question: 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: Identify the type of tissue in the following: Skin, bark of tree, bone, lining of kidney tubule, vascular bundle.

Answer:

1. Skin—Striated squamous epithelium
2. Bark of tree—Cork, protective tissue
3. Bone—Connective tissue
4. Lining of kidney tubule—Cuboidal epithelium tissue
5. Vascular bundle—Conducting tissue

Question: 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: 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: 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: Complete the table:

Answer:

Question: Give four differences between bone and cartilage.

Answer: Bone:

1. Hard and non-flexible
2. Porous
3. Blood vessels present
4. Matrix made up of protein and mineral salts.

Cartilage:

1. Flexible not very hard
2. Non-porous
3. Blood vessels absent
4. Matrix made up of proteins.

Question: Give the functions of bone.

Answer: The functions of bone are:

1. It provides shape to the body.
2. It provides skeletal support to the body.
3. It anchors the muscles.
4. It protects the vital body organs like brain, lungs, etc.