(a) Ureters in frogs: A ureter acts as a urinogenital duct, which carries sperms along with urine in male frogs. (b) Malphigian tubules: Malphigian tubules are excretory organs in cockroaches. (c) Body wall in earthworms: In earthworms, the body wall consists of muscle layers. It helps in movement aRead more
(a) Ureters in frogs: A ureter acts as a urinogenital duct, which carries sperms along with urine in male frogs.
(b) Malphigian tubules: Malphigian tubules are excretory organs in cockroaches.
(c) Body wall in earthworms: In earthworms, the body wall consists of muscle layers. It helps in movement and burrowing.
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, 5tRead more
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.
(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 simpRead more
(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.
(a) Simple epithelium and compound epithelium. Simple epithelium:- 1. It is composed of only one layer of cells. 2. It is mainly involved in the function of absorption and secretion. 3. It is present in the lining of the stomach, intestine. Compound epithelium 1. It is composed of many layers of celRead more
(a) Simple epithelium and compound epithelium.
Simple epithelium:-
1. It is composed of only one layer of cells.
2. It is mainly involved in the function of absorption and secretion.
3. It is present in the lining of the stomach, intestine.
Compound epithelium
1. It is composed of many layers of cells.
2. 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 pharynx and buccal cavity.
(b) Cardiac muscle and striated muscle
Cardiac muscles:-
1. They are involuntary in function.
2. They are multi-nucleate and branched.
3. They are found only in the heart.
Striated muscles:-
1. They are voluntary in function.
2. They are multi-nucleate and unbranched.
3. They are found only in triceps, biceps, and limbs.
(c) Dense regular connective tissues:-
1. In dense regular connective tissues, collagen fibres are present in rows between parallel boundless fibres.
2. They are present in tendons and ligaments.
Dense irregular connective tissues:-
1. In dense irregular connective tissues, fibres are arranged irregularly.
2. They are present in the skin.
(d) Adipose and blood tissue
Adipose tissue:-
1. It is composed of collagen fibres, elastin fibres, fibroblasts, macrophages, and adipociytes.
2. It helps in the synthesis, storage, and metabolism of fats.
3. It is present beneath the skin.
Blood tissue:-
1. It is composed of RBCs, WBCs, platelets, and plasma.
2. It helps in the transportation of food, wastes, gases, and hormones.
3. It is present in the blood vessels.
(e) Simple gland and compound gland:-
Simple glands:-
1. They contain isolated glandular cells.
2. They are unicellular.
3. Examples include goblet cells of the alimentary canal.
Compound glands:-
1. They contain a cluster of secretory cells.
2. They are multicellular.
3. Examples include salivary glands.
(a) Chondriocytes:- They are cells of cartilages, and are present in small cavities within the matrix secreted by them. (b) Axons:- They are long, slender projections of neurons that help in carrying nerve impulses from the neuron body. Axons aggregate in bundles which make up the nerves. (c) CiliatRead more
(a) Chondriocytes:-
They are cells of cartilages, and are present in small cavities within the matrix secreted by them.
(b) Axons:-
They are long, slender projections of neurons that help in carrying nerve impulses from the neuron body. Axons aggregate in bundles which make up the nerves.
(c) Ciliated epithelium:-
It consists of simple columnar or cuboidal epithelium with cilia on their free surfaces. It is present on the inner surface of the oviducts and bronchioles. It helps in the movement of eggs or mucus in specific directions.
Mention the function of the following (a) Ureters in frog (b) Malpighian tubules (c) Body wall in earthworm
(a) Ureters in frogs: A ureter acts as a urinogenital duct, which carries sperms along with urine in male frogs. (b) Malphigian tubules: Malphigian tubules are excretory organs in cockroaches. (c) Body wall in earthworms: In earthworms, the body wall consists of muscle layers. It helps in movement aRead more
(a) Ureters in frogs: A ureter acts as a urinogenital duct, which carries sperms along with urine in male frogs.
(b) Malphigian tubules: Malphigian tubules are excretory organs in cockroaches.
(c) Body wall in earthworms: In earthworms, the body wall consists of muscle layers. It helps in movement and burrowing.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-7/
Mention briefly about the circulatory system of earthworm
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, 5tRead more
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.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-7/
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; antennae (e) Protonema; mesothorax; metathorax; coxa
(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 simpRead more
(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.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-7/
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
(a) Simple epithelium and compound epithelium. Simple epithelium:- 1. It is composed of only one layer of cells. 2. It is mainly involved in the function of absorption and secretion. 3. It is present in the lining of the stomach, intestine. Compound epithelium 1. It is composed of many layers of celRead more
(a) Simple epithelium and compound epithelium.
Simple epithelium:-
1. It is composed of only one layer of cells.
2. It is mainly involved in the function of absorption and secretion.
3. It is present in the lining of the stomach, intestine.
Compound epithelium
1. It is composed of many layers of cells.
2. 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 pharynx and buccal cavity.
(b) Cardiac muscle and striated muscle
Cardiac muscles:-
1. They are involuntary in function.
2. They are multi-nucleate and branched.
3. They are found only in the heart.
Striated muscles:-
1. They are voluntary in function.
2. They are multi-nucleate and unbranched.
3. They are found only in triceps, biceps, and limbs.
(c) Dense regular connective tissues:-
1. In dense regular connective tissues, collagen fibres are present in rows between parallel boundless fibres.
2. They are present in tendons and ligaments.
Dense irregular connective tissues:-
1. In dense irregular connective tissues, fibres are arranged irregularly.
2. They are present in the skin.
(d) Adipose and blood tissue
Adipose tissue:-
1. It is composed of collagen fibres, elastin fibres, fibroblasts, macrophages, and adipociytes.
2. It helps in the synthesis, storage, and metabolism of fats.
3. It is present beneath the skin.
Blood tissue:-
1. It is composed of RBCs, WBCs, platelets, and plasma.
2. It helps in the transportation of food, wastes, gases, and hormones.
3. It is present in the blood vessels.
(e) Simple gland and compound gland:-
Simple glands:-
1. They contain isolated glandular cells.
2. They are unicellular.
3. Examples include goblet cells of the alimentary canal.
Compound glands:-
1. They contain a cluster of secretory cells.
2. They are multicellular.
3. Examples include salivary glands.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-7/
What are the following and where do you find them in animal body (a) Chondriocytes (b) Axons (c) Ciliated epithelium
(a) Chondriocytes:- They are cells of cartilages, and are present in small cavities within the matrix secreted by them. (b) Axons:- They are long, slender projections of neurons that help in carrying nerve impulses from the neuron body. Axons aggregate in bundles which make up the nerves. (c) CiliatRead more
(a) Chondriocytes:-
They are cells of cartilages, and are present in small cavities within the matrix secreted by them.
(b) Axons:-
They are long, slender projections of neurons that help in carrying nerve impulses from the neuron body. Axons aggregate in bundles which make up the nerves.
(c) Ciliated epithelium:-
It consists of simple columnar or cuboidal epithelium with cilia on their free surfaces. It is present on the inner surface of the oviducts and bronchioles. It helps in the movement of eggs or mucus in specific directions.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-7/