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Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3

Q: 9. Distinguish between

(A) Simple epithelium and compound epithelium

(B) Cardiac muscle and striated muscle

(C) Dense regular and dense irregular connective tissues

(D) Adipose and blood tissue

(E) Simple gland and compound gland

Answer:

(A)

Q_9_A_Table of Simple and Compound EpitheliumQ_9_A_Table of Simple and Compound Epithelium
Simple EpitheliumCompound Epithelium
1.It is composed of only one layer of cells1.It is composed of many layers of cells.
2.It is mainly involved in the function of absorption and secretion2.It is mainly involved in the function of protection and has a limited role in absorption and secretion.
3.It is present in the lining of the stomach, intestine.3.It is present in the lining of the pharynx and buccal cavity.
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3

(B)

Q_9_B_Table of Cardiac and Striated MusclesQ_9_B_Table of Cardiac and Striated Muscles
Cardiac musclesStriated muscles
1.They are involuntary in function.1.They are voluntary in function.
2.They are multi-nucleate and branched.2.They are multi-nucleate and unbranched.
3.They are found only in the heart.3.They are found only in triceps, biceps, and limbs.
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3

(C)

Q_9_C_Table of Dense Regular and Irregular Connective TissuesQ_9_C_Table of Dense Regular and Irregular Connective Tissues
Dense Regular Connective TissuesDense Irregular Connective Tissues
1.In dense regular connective tissues, collagen fibres are present in rows between parallel boundless fibres.1.In dense irregular connective tissues, fibres are arranged irregularly.
2.They are present in tendons and ligaments.2.They are present in the skin.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3

(D)

Q_9_D_Table of Adipose and Blood TissuesQ_9_D_Table of Adipose and Blood Tissues
Adipose TissueBlood tissue
1.It is composed of collagen fibres, elastin

fibres, fibroblasts, macrophages, and adipocytes.

1.It is composed of RBCs, WBCs, platelets, and plasma.
2.It helps in the synthesis, storage, and metabolism of fats.2.It helps in the transportation of food, wastes, gases, and hormones.
3.It is present beneath the skin.3.It is present in the blood vessels.

(E)

Q_9_E_Table of Simple and Compound GlandsQ_9_E_Table of Simple and Compound Glands
Simple GlandsCompound Glands
1.They contain isolated glandular cells.1.They contain a cluster of secretory cells.
2.They are unicellular.2.They are multicellular.
3.Examples include goblet cells of the alimentary canal.3.Examples include salivary glands.
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3
4.
Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3

Q: 10. Mark the odd one in each series:

(A) Areolar tissue; blood; neuron; tendon

(B) RBC; WBC; platelets; cartilage

(C) Exocrine; endocrine; salivary gland; ligament

(D) Maxilla; mandible; labrum; arthur; cox

Answer:

(A) Areolar tissue, blood, and tendons are examples of connective tissues. Neuron is an example of neural tissue.

(B) RBCs, WBCs, and platelets are the three most important components of blood. Cartilage is therefore, the odd one out.

(C) Exocrine, endocrine, and salivary glands are examples of simple glandular epithelium. Ligament is a connective tissue.

(D) Maxilla, mandible, and labrum are mouthparts of a cockroach. Antennae, on the other hand, are present in the head region of cockroaches.

(E) Protonema forms the developmental stage in the life cycle of a moss. Mesothorax, metathorax, and coxa are parts or segments present in the legs of a cockroach.

Q: 11. Match the terms in column I with those in column II:

Q_11_1_The Terms in Column I with Those in Column IIQ_11_1_The Terms in Column I with Those in Column II
Column IColumn II
ACompound Epithelium(i)Alimentary Canal
BCompound Eye(ii)Cockroach
CSeptal Nephridia(iii)Skin
DOpen Circulatory(iv)Mosaic Vision
ETyphlosole(v)Earthworm
FOsteocytes(vi)Phallomere
GGenitalia(vii)Bone

Answer:

Q_11_2_The Terms in Column I and Column IIQ_11_2_The Terms in Column I and Column II
Column IColumn II
ACompound Epithelium(iii)Skin
BCompound Eye(iv)Mosaic Vision
CSeptal Nephridia(v)Earthworm
DOpen Circulatory(ii)Cockroach
ETyphlosole(i)Alimentary Canal
FOsteocytes(vii)Bone
GGenitalia(vi)Phallomere

Q: 12. Mention briefly about the circulatory system of earthworm

Answer:

Earthworms (Pheretima) have closed blood vascular systems, which consists of the heart, blood vessels, and capillaries. The heart pumps blood for circulating it in one direction. Blood is supplied by smaller blood cells to the gut nerve cord and the body wall. Blood glands are present in the 4th, 5th, and 6th segments, which produce blood cells and haemoglobin dissolved in blood plasma. Blood cells in earthworms are phagocytic in nature.

Illustration: Biology Class 11 NCERT Solutions: Chapter 7 Structural Organisation in Animals Part 3