Browse by Stream
-
Engineering and Architecture
Exams
Colleges
Predictors
Resources
-
Computer Application and IT
Quick Links
Colleges
-
Pharmacy
Colleges
Resources
-
Hospitality and Tourism
Colleges
Resources
Diploma Colleges
-
Competition
Other Exams
Resources
-
School
Exams
Top Schools
Products & Resources
-
Study Abroad
Top Countries
Resources
-
Arts, Commerce & Sciences
Exams
Colleges
Upcoming Events
Resources
-
Management and Business Administration
Colleges & Courses
Predictors
-
Learn
Law Preparation
MBA Preparation
Engineering Preparation
Medical Preparation
-
Online Courses and Certifications
Top Streams
Specializations
- Digital Marketing Certification Courses
- Cyber Security Certification Courses
- Artificial Intelligence Certification Courses
- Business Analytics Certification Courses
- Data Science Certification Courses
- Cloud Computing Certification Courses
- Machine Learning Certification Courses
- View All Certification Courses
Resources
-
Medicine and Allied Sciences
Colleges
Predictors
Resources
-
Law
Resources
Colleges
-
Animation and Design
Exams
Predictors & Articles
Colleges
Resources
-
Media, Mass Communication and Journalism
Colleges
Resources
-
Finance & Accounts
Top Courses & Careers
Colleges
Get Answers to all your Questions
- #National Eligibility Cum Entrance Test
- #Diversity in Living World
- #National Eligilibility Cum Entrance Test
- #Class 11
- #Biology
- #Medical
Major nitrogenous excretory material in earthworm is
Option: 1
Uric acid
Option: 2
Ammonia
Option: 3
Urea
Option: 4
Amino acids
Answers (1)
Excretory system of Earthworm
- The excretory system of earthworm consists of segmentally arranged coiled tubes called nephridia
- The major function of nephridia is to regulate the volume and composition of the body fluids
- A nephridium starts as a funnel which collects excess fluid from coelomic chamber
- The tubular part of the nephridium delivers the wastes through a pore to the surface in the body wall into the digestive tube
- The nephridia are of three types i.e. pharyngeal nephridia, integumentary nephridia and septal nephridia
Integumentary nephridia
- These are V-shaped nephridia attached to the lining of the body wall of segment 3 to the last which open to outside through nephridiopores
- These nephridiopores are minute openings present on the body surface.
Septal nephridia
- These are the largest nephridia in earthworm
- These are arranged along the sides of the intersegmental septum from 15th segment onwards
- These open into the intestines
Pharyngeal nephridia
- It is present as three paired tufts in the 4th, 5th and 6th segments on either side of the pharynx and oesophagus
- They open into buccal cavity and pharynx
Hence, the correct option is (b).
View full answer
NEET 2024 Most scoring concepts
- Just Study 32% of the NEET syllabus and Score up to 100% marks
