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Excretory Products and Their Elimination NEET Notes FAQs
What are the excretory products and their elimination?
Excretory products include urea, uric acid, ammonia, carbon dioxide, and water. Their elimination happens through the excretory system, mainly involving kidneys, lungs, and skin.
What are the 5 examples of excretory products?
The five examples of excretory products are urea, ammonia, uric acid, carbon dioxide, and bile pigments.
What are the excretory products of plants and their elimination?
Plants excrete oxygen during photosynthesis, water through transpiration, and metabolic wastes like resins, gums, and tannins.
Why is this chapter important for NEET?
It is essential for NEET as it is concept-heavy and contributes to human physiology questions, which are high-scoring in exams.
Excretory Products and Their Elimination NEET Notes 2025 PDF
Excretory Products and Their Elimination NEET Notes, Prepare for NEET 2025 with detailed notes on Excretory Products and Their Elimination. Learn concepts and weightage.
Soumya Tiwari27 Jan, 2025
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Excretory Products and Their Elimination NEET Notes:
Excretory Products and Their Elimination is an important chapter for NEET aspirants. It helps students understand how the human body removes waste products to maintain homeostasis. This topic is not only essential for scoring well in the
NEET Exam
but also provides a foundational understanding of human physiology, which is critical for medical studies. Questions from this chapter are frequently asked in NEET exams, making it a high-weightage topic.
Excretory Products and Their Elimination NEET Notes Overview
Excretory Products and Their Elimination
NEET Notes explains the excretory system in humans and other organisms. It focuses on how kidneys function to filter waste from the blood, the process of urine formation, and the role of other excretory organs like the skin, lungs, and liver. It also covers the elimination of nitrogenous wastes, disorders related to excretion, and adaptations of organisms for excretion.
Having a clear understanding of these concepts is crucial for NEET preparation, as they are directly linked to human health and disease, topics that frequently appear in exams.
Excretory Products and Their Elimination NEET Notes PDF
PW offers a full chapter PDF under the
Prachand Batch NEET 2025
, which includes detailed explanations of all topics, important diagrams, and step-by-step notes for better understanding.
You can also watch the full video lecture on this chapter on PW's YouTube channel for free, making it accessible and easy to prepare.
What are Excretory Products and Their Elimination?
Excretory products are the waste substances produced in the body as a result of metabolism. These products need to be removed from the body to maintain its normal functioning and homeostasis. The process of removing these waste products is called excretion. The main excretory products in humans include:
Urea
: This is the main nitrogenous waste in humans. It is produced in the liver when proteins are broken down. Urea is excreted through urine by the kidneys.
Carbon Dioxide (CO2):
Produced during cellular respiration, CO2 is carried in the blood to the lungs, where it is exhaled.
Water:
Water is both a byproduct of metabolic reactions and a waste product that needs to be removed. It is excreted through urine, sweat, and in exhaled air.
Salts:
Excess salts are eliminated from the body through urine and sweat.
Weightage of Excretory Products and Their Elimination NEET Notes - Last 5 Years
The table below shows the chapter’s weightage based on the NEET exams from 2020 to 2024:
Weightage Following Previous Year’s Trends (2020-2024)
Chapter
Easy
Medium
Hard
Total
Average Q/yr
Weightage
Excretory Products and their Elimination
3
5
3
11
2.20
4.17%
NEET Chapter Wise Weightage 2025 for Biology
Topics
Weightage (%)
Excretory Products and their Elimination
5%
Importance of Excretory Products and Their Elimination NEET Notes
Understanding this chapter is essential for solving related NEET questions quickly and accurately.
It helps in grasping the physiological processes of excretion, which are linked to many medical topics.
It includes disorders like kidney failure, dialysis, and uremia, which are highly relevant for NEET.
Many questions in NEET are concept-based, and this chapter provides ample scope for scoring.
Tips for Excretory Products and Their Elimination NEET Notes
Preparing this chapter efficiently requires understanding and practice.
Focus on the structure and functioning of kidneys and nephrons, as questions often revolve around them.
Learn the steps of urine formation, including ultrafiltration, reabsorption, and secretion.
Practice diagrams of the kidney, nephron, and excretory system for better conceptual clarity.
Understand the differences between ammonia, urea, and uric acid and their excretion in different organisms.
Revise disorders and adaptations of excretory systems thoroughly.
Join
PW's online NEET courses
that provide clear explanations, interactive classes, and expert guidance. With detailed notes and mock tests, you can strengthen your preparation.
