establish the relation between structure and function in each of the following bones areolar tissue striated muscles
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Explanation:
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Answer:
Q1. Name the tissues responsible for the movement of the body.
Answer: Muscle tissue and nervous tissue
Q2. How does neuron look like?
Answer: A neuron is the unit cell of nervous tissue. It is a thread-like structure with cell body and axon.
Q3. Name the types of simple tissues.
Answer: (a) Parenchyma (b) Collenchyma (c) Sclerenchyma
Q4. Name the types of complex tissues.
Answer: Xylem and phloem.
Q5. Where is apical meristem found? .
Answer: It is present at the growing tips of stem and root, it increases the length of the stem and roots.
Q6. Which tissue make up the husk of coconut?
Answer: Sclerenchyma.
Q7. What are the constituents of phloem?
Answer: Phloem constitutes the sieve tubes, companion cell, phloem parenchyma and phloem fibres.
Q8. Define aerenchyma.
Answer: When the cells have air-filled large cavities of parenchyma, it is called aerenchyma. Aerenchyma helps aquatic plants in floating.
Q9. What is the utility of tissues in multicellular organisms?
Answer: It helps in growth, organisation of different organs and performing functions.
Q10. Name the two types of tissues.
Answer: Plant tissues and animal tissues.
Q11. Name the two types of plant tissue.
Answer: Meristematic tissue and permanent tissue.
Q12.What is differentiation?
Answer: The process of taking up a permanent shape, size and function by cells is called differentiation.
Q13. Name the three types of meristematic tissues.
Answer: The three types are:
(a) Apical tissue—tips of root and shoot
(b) Lateral tissue—sides of stem
(c) Intercalary tissue—at nodes
Q14. Where is apical tissue found?
Answer: Present at the tips of roots and stems.
Q15. Tissues present at the lateral surface of the stem are called apical tissues. Put (T) if true and put (F) if false. Rewrite the answer if (F).
Answer: (F). Tissues present at the lateral surface of the stem are called lateral tissue.
Q16. Which tissues are present at the nodes of the plants?
Answer: Intercalary tissue.
Q17. What are the various types of blood cells?
Answer: There are three types:
(a) RBC’s
(b) WBC’s and
(c) Platelets.
Q18. What are tracheids?
Answer: They are elongated cells with tapering ends.
Q19. What are guard cells?
Answer: Each stomata is bounded by a pair of specialised kidney-shaped epidermal cells called guard cells.
Q20. Epithelial tissue is the simplest tissue. Write (F) for false or (T) for true.
Answer: (T).
Q21. What are the functions of cuboidal epithelium?
Answer: It helps in absorption, excretion, secretion, it also provides mechanical support.
EXERCISE: SHORT ANSWER TYPE QUESTIONS
Q2. Give the functions of bone.
Answer: The functions of bone are:
(i) It provides shape to the body.
(ii) It provides skeletal support to the body.
(iii) It anchors the muscles.
(iv) It protects the vital body organs like brain, lungs, etc.
Q3. Give the functions of cartilage.
Answer: (i) It provides support and flexibility to the body parts.
(ii) It smoothens surface at joints.
Q4. Fill in the blanks: (i) Water and minerals are conducted by …………………. (ii) In higher plants food is conducted by …………………….. (iii) Blood is a ……………. tissue. (iv) Bone consists of………….cells. (v) Cartilage consists of………………..cells. (vi) Fibres are absent in………….type of connective tissue.
Answer: (i) Xylem (ii) Phloem
(iii) Connective (iv) Osteocyte
(v) Chondrocyte (vi) Blood
Q5. What are the functions of areolar tissue?
Answer: Functions are:
(i) It helps in repair of tissues after an injury.
(ii) It also helps in combating foreign toxins.
(iii) It fixes skin to underlying muscles.
Q7. What are fibres?
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Answer: Fibres consist of very long, narrow and thick cells. Example, jute fibre.
Q8. Name the tissues for the following: (a) Stores fat in animal body. (b) Divides and re-divides to grow in plants. (c) Tissue that joins hone to hone. (d) Covers the external surface of animal body.
Answer: (a) Adipose tissue
(b) Meristematic tissue .
(c) Ligament
(d) Epithelial tissue.
Q9. What is stomata?
Answer: Stomata are small pores present on the surface of a leaf which helps in the exchange of gases and in transpiration.
Q10. Why does epidermal tissue have no intercellular space?
Answer: The epidermal (layer) tissue forms a protective outer covering for the plants and it protects the internal parts of the plant. It aid in the protection against loss of water, mechanical injury and invasion by parasitic fungi.
For this protective role to play the continuation of cells is necessary, hence it does not have intercellular space.
Q11. Name and give the function of each cell of xylem:.
Answer: Xylem consists of tracheids, vessels, xylem parenchyma and xylem fibres.
Tracheids and vessels
Q12. What is the function and location of stratified squamous epithelium?
Answer: Stratified squamous epithelium is present in the skin. The layers of cells are arranged to prevent wear and tear.