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Byju's Answer
Standard VII
Biology
Phylum Annelida
In Pheretima,...
Question

In Pheretima, the gizzard, buccal cavity, pharynx, oesophagus and pharyngeal nephritides receive the blood from which blood vessel?

A
Supra oesophageal
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B
Lateral oesophageal
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C
Dorsal
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D
Subneural
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Solution

The correct option is C Dorsal
In Pheretima gizzard, buccal cavity, pharynx, oesophagus, pharyngeal nephritides receive the blood from the dorsal blood vessel. The dorsal blood vessel is part of the circulatory system of the earthworm that carries blood to the front of its body. It is a single structure that runs along the back of the worm's body. So, the correct answer is option C.
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Q. Which is an incorrect statement of pheretima excretory organs?
(1) Septal nephridia are present only one side of the septum from 15 to last
(2) Nephridia regulate the volume and composition of body fluids.
(3) A nephridium starts out like a funnel that collects excess fluid from the Coelomic chamber.
(4) Pharyngeal nephridia discharge the waste material into the buccal cavity and pharynx.
Q. Which type of epithelium is found in oesophagus, buccal cavity, cornea, vagina and cervix?
Q. Select the Incorrect statement.
1) Pheretima blood circulation is closed type.
2) Blood glands present above the pharyngeal mass produce only blood cells.
3) In earth worm gascous exchange take place between blood capillaries of outer epidermis and surface film of moisture.
4) In pheretima nephridia present in all body segments except first two segments.
Q. Select the correct option:
Match column I with column II and select the correct option from the codes given below:
Column I
(Parts of alimentary
canal of earthworm)		Column II
(Respective segments)
(A) Buccal cavity(i) 1-3
(B) Pharynx(ii) 3-4
(C) Oesophagus(iii) 5-7
(D) Gizzard(iv) 8-9
(E) Stomach(v) 9-14
(F) Intestine(vi) 15 to last
(G) Typhlosole(vii) 26-35

Q. Select the incorrect statements.
(a) The alimentary canal begins with an anterior cavity called the buccal cavity.
(b) The tooth is embedded in a socket of mandible bone only.
(c) Human shows the strict diphyodont type of dentition.
(d) Oesophagus and the trachea open into the pharynx.
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