This document presents a lesson plan about excretion in different organisms. It covers the excretory systems of amoeba, earthworm, and cockroach. For amoeba, excretion occurs via contractile vacuoles. Earthworms excrete through nephridia, and insects like cockroaches excrete via malpighian tubules that empty into the digestive tract. The lesson includes activities like role-playing the process in amoebas and quizzes to reinforce understanding of the different excretory structures.

1. St. Thomas Training College
Mukkolakkal
Self Designed Innovative lesson Plan
Submitted to
Mrs. Asasindhu S S
Lecturer in Natural Science
STTC, Mukkolakkal
Submitted By
SIMI S NAIR
Reg No.
Natural Science

2. STTC, Mukkolakkal
EXCRETION
IN
AMOEBA, EARTHWORM AND COCKROACH
Standard X
Unit: V. After Metabolism

3. Name of the teacher : Simi S Nair
Name of the School : STTC, Mukkolakkal
Subject : Biology
Unit : After metabolism
Topic : Excretion in other organism
Standard : X
Strength : 46/52
Date : 15.07.2014
Period : 2nd
Time : 40 mts

4. Curricular statement
 To attain knowledge about excretory system
 To understand different types of excretory organs in different animals
 To attain idea about the function of excretory organs
Learning outcomes
Remembering: - Learner recalling the organisms like amoeba, earth worm
and cockroach.
Understanding: The learner explains the function of excretory organ.
Apply: - the learner gives reason how the excretory materials are different in
different organs.
Analyze: - The learner analyze the role of excretory organs in the body.
Evaluate: - the learner judges the importance of the excretory organs.
Create: - the learner plans to keep a healthy excretory function.
Process skills
The learner developing observation skill through observing excretory
materials of different organism
The learner comparing the mode of excretion of different animals.
Content analysis

5. Terms: - Amoeba, contractile vacuole, earthworm Nephridia, Malpighian tubule, ,
Facts
1. The excretory organs in amoeba is contractile vacuoles
2. Nephridia are the excretory organs in earth worm
3. Nephridia separate water and nitrogeneous waste from body cavity.
4. Excretory organs of insect are known as malpighian tubules
5. Malphegian tubule separate impurities from the body cavity and carry
them to the alimentary canal from there they are expelled.
6. Malphegian tubule opens out into alimentary canal
Concept
Major : Excretory organs
Minor :- Excretory organ in Amoeba
Pre requisites
The learner already knows the kidneys are the excretory organs of higher
animals
The learner already knows kidney is absent in lower organisms .
Teaching learning resources

6. A set of self learning module contains different excretory organs of different
animals. A chart showing excretory organs of amoeba earthworm and
cockroach
Introduction
These learning modules are about excretory organs of different organism.
You may be familiar with this method of learning to arrange the learning aspects in
the form of a small capsule you just go through it and try to do the activities given.
Then answer the questions below. If you are correct in the first step you can go to
the other capsule. But if you are wrong you can repeat the same capsule and try to
answer the question correctly.
Objective
To attain the knowledge about excretory organs of different organisms
To distinguish between the different form of excretory materials of animals
Pretest
What is excretory system?
Which are the excretory organs in human?
Answers
Systems responsible for excretion of waste material from the body
Kidney

7. AMOEBA
Module No 1
In amoeba there are no excretory organs. Amoeba is a
unicellular organism. Excretion is performed with the help of
contractile vacuoles. Excess water that reaches the body is also
expelled through the contractile vacuole

8. ACTIVITY NO: 1
ROLE PLAY
Teacher calls some pupil and ask them to form like structure of
amoeba by holding their hand and also ask to form nucleus, contractile
vacuole etc. Teacher then ask to act as method of excretion in amoeba.
Nucleus
Excretory material
Contractile vacuole
After the completion of role play teacher distribute some
questions and ask pupil to answer the question.

9. Questions
1. Which is the excretory organ in Amoeba?
2. Point out contractive vacuole in the figure.
Answer
1. Contractile vacuole
2.

10. . Contractile vacuole
EARTH WORM
Module No 2
Teacher shows the excretory organ of earth worm and ask pupil carefully watch
the excretory organ and understand the following questions and answer.
Questions
1. Which is the excretory organ in earth worm?
2. How nephridia are seen in earth worm?
3. What is the function of nephridia?
Answers

11. 1. Nephridia
2. Each segment contains a pair of nephridia, which are ciliated and funnel
shaped
3. Nephridia separate water nitrogenous wastes etc from the body cavity and
expel them through the pores on the body surface.
Activity no 2
Teacher ask pupil to write down a brief note on the excretion of earth
worm.
Pupil’s response
Pupil tries to give a brief note as,
Excretory organs in earth worm are called Nephredia. Each segment
contains a pair of nephridium, which is ciliated and funnel shaped.
Nephredia separate water, nitrogenous wastes etc from the body cavity
and expel them through the pores on the body surface

12. INSECTS
Module No 3
The excretory organs of insects are known as Malpighian
tubules. They are minute tubes spread out in the body fluid that
fills the body cavity and open out into the alimentary canal.
Malpighian tubule separate impurities from the body fluid and
carry them to the alimentary canal from where they are expelled.

13. ACTIVITY NO: 3
Teacher explains each point and asks them to find out some questions
from the given paragraph of excretion in cockroach and conduct a quiz
competition.
Pupil response
Pupils do so
Questions
1. Which is the excretory organ in insets?
2. What is the feature of malpighian tuble?
3. Where from malpighian tubule separate impurities?
4. Malpighian tubule open out into ………………..
5. How Malpighian tubule function?
Answers
1. Malpighian tubule
2. They are minute tubes spread out in the body fluid and opens out into
alimentary canal.
3. Body fluid

14. 4. Alimentary canal
5.Malpighian tubule spread in body fluid and separate imparities from the
body fluid and carry them to the alimentary canal from there they are
expelled
FORMATIVE ASSESSMENT
1. Which are the excretory organs of earthworm?
2. Which are the excretory organs of insects?
3. Which are the excretory materials of tadpole?
FOLLOW UP ACTIVITY
 Draw the excretory organ of amoeba ,earth worm and cockroach in
your science diary