Class 11 Biology - Chapter Structural Organisation in Animals NCERT Solutions | Mention briefly about the circulatory sy
Welcome to the NCERT Solutions for Class 11th Biology - Chapter Structural Organisation in Animals. This page offers a step-by-step solution to the specific question from Exercise 1, Question 12: mention briefly about the circulatory system of ea....
Question 12
Mention briefly about the circulatory system of earthworm
Answer
Earthworm (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.
More Questions From Class 11 Biology - Chapter Structural Organisation in Animals
- Q:- Describe various types of epithelial tissues with the help of labelled diagrams.
- Q:- What are the cellular components of blood?
- Q:- What are the following and where do you find them in animal body
(a) Chondriocytes
(b) Axons
(c) Ciliated epithelium - Q:- Draw a neat diagram of digestive system of frog.
- Q:- Answer in one word or one line. (i) Give the common name of Periplaneta americana. (ii) How many spermathecae are found in earthworm? (iii) What is the position of ovaries in the cockroach? (iv) How many segments are present in the abdomen of cockroach? (v) Where do you find malphigian tubules?
- Q:- Distinguish between the following
(a) Prostomium and peristomium
(b) Septal nephridium and pharyngeal nephridium - Q:- Answer the following: (i) What is the function of nephridia? (ii) How many types of nephridia are found in earthworm based on their location?
- Q:- 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 - Q:- 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) Prothorax; mesothorax; metathorax; coxa - Q:- Match the terms in column I with those in column II:
Column I Column II
(a) Compound epithelium (i) Alimentry canal
(b) Compound eye (ii) Cockroach
(c) Septal nephridia (iii) Skin
(d) Open circulatory system (iv) Mosaic vision
(e) Typhlosole (v) Earthworm
(f) Osteocytes (vi) Phallomere
(g) Genitalia (vii) Bone
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2 Comment(s) on this Question
ritika
2018-11-05 19:56:32
thank you for this wonderful solution
Ishika
2018-08-18 19:12:27
Thank You Very easy answer,easy to learn.
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