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SubjectPaid lesson

Excretion

ClassNotes Team 4 MIN READUPDATED 4 JUL 2026

Biology SSS 1 First Term

WEEK 8

Excretion

Performance Objectives

Student should be able to:

  1. Define the term excretion and state its importance
  2. Gives the products of excretion

Content

Excretion is defined as the process by which organisms get rid of waste products during its metabolism. The reason for excretion by all living things is to get rid of metabolic wastes which are poisonous or toxic to the body system when they are not removed. Different organisms use different means of removing waste products from their body systems. The table below shows the excretory organs/organelles and waste products of some organisms.

 

Importance of Excretion

  1. Excretion in green plants produces water as respiratory products.
  2. Carbon dioxide released by humans during exhalation…