Solve
Guides
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Standard IX
Biology
Question

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.

Open in App
Solution
Verified by Toppr

  • Statement 'Septal nephridia are present only one side of the septum from 15 to last' is incorrect.
  • The septal nephridia are located on both sides of the septa--thread-like structures that hold the skin to organs below it--in rows of forty or fifty individual nephridia. They appear after the 15th segment, and they empty into a pair of excretory ducts that lead to the main gut cavity.

Was this answer helpful?
0
Similar Questions
Q1
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.
View Solution
Q2
Select the correct statements with reference to pheretima (excretory system)
A) Nephridia help in excretion and osmoregulation
B) Septal nephridia collects the wastes from coelomic fluid with the help of nephrostomes
C) Integumentary nephridia discharge waste materials to the outer body surface through the nephridiopores
D) Septal nephridia and pharyngeal nephridia discharge wastes into luman of gut.
View Solution
Q3
Which of the following statements is correct about excretion in earthworm?
(i) Earthworm is mainly ureotelic
(ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last, open into intestine,
(iii) Integumentary nephridia, attached to lining of body wall of segment 3 to the last, open on the body surface.
(iv) Different types of nephridia are basically similar in structure.
(v) Nephridia regulate the volume and composition of body fluids

View Solution
Q4
Septal nephridia of earthworm discharge excretory product into
View Solution
Q5
The figure shows nephridial system of earthworm is given here. Identify the types of nephridia labelled as A, B and C from the list (i) to (iii) given below and select the correct option.
(i) Septal nephridia
(ii) Integumentary nephridia
(iii) Tufts fo pharyngeal nephridia

883888_d29d42d94e334d70a2627c78a917e2a2.PNG
View Solution