Excretion Lesson
Excretion Lesson
Excretion Lesson
CLASS: Form 5
TIME: 40 minutes
PERIODS: 1
UNIT: Excretion
TOPIC: Introduction to excretion
REFERENCES (exclude class text, include page numbers).
PRE-REQUISITES
For Teacher
CONCEPT OR PRINCIPLE
Excretion is necessary in living organisms for removal of metabolic waste, which if left to
accumulate in the body, would be toxic to the organism.
SPECIFIC OBJECTIVES
Classification
Cognitive( Remember)
Cognitive ( Understand)
Cognitive (Remember)
Affective( Receiving)
PROCESS SKILLS
Extracting from available information data relevant to a particular situation
ACTIVITIES
Introduction:
Engagement - Teacher projects a four picture collage and then asks them which one doesnt belong
there.
Students are expected to realize that three pictures deal with excretion and one deals with egestion.
Students are asked what they think excretion is and why it is important.
Students are asked the difference between egestion and excretion.
Teacher says that today you are going to learn about the main organs involved in excretion in animals,
how the different excretory products form and how the organs remove the metabolic waste.
Consolidation:
EvaluationStudents are then given a work sheet.
Teacher recaps main points of the lesson.
TEACHERS REFLECTION
Although I was a bit flustered due to reaching late due to an accident on the highway, I managed to
compose myself and deliver my lesson to the best of my ability. In my opinion my lesson was good
however I thought that I could have engaged students more. Students enjoyed the engagement activity
and appreciated the use of a concept map to simplify an abundance of information. I tried my best to be
open and inviting to make students feel comfortable. This worked as students began to loosen up as the
class progressed.
TUTORS COMMENTS
Neerja Yadav-Dulalchan
Friday 18th September
Group visit
Excretion
A confident presentation that engaged students and did a good job of breaking down complex concepts.
Introduction: A fun cartoon that captured attention, helped to get students understanding of the process
of excretion and distinguishing it from egestion. Excretion correctly explained as the secretion byproduct of metabolic waste, but this concept is not always understood, further visual data would help,
e.g a picture of a cell, and the digestive system. The students should be able to state in which of these
structures excretion and egestion occurs, and if not, it could be clarified.
The development of the concepts occurred through probes, explanations and a concept map that the
teacher built as the topic proceeded. This was a good strategy as it allowed students to see the
connections between the multiple concepts of the topic product, process, organ. Concept maps aid
memory and understanding because students see the big picture and connections to the big idea. Neerja
was also able to de-construct meanings such as de-amination, which would help students to make sense
of the concept rather than just wrote learn it.
The issue of toxicity was discussed, and this could link to students lives through the idea of dialysis.
Given the level of diabetes in the country this might have been a useful analogy. Overall the concepts
were logically sequenced, clearly presented, and linked to students lives.
Name: ____________________________
Introduction to Excretion
Name: ____________________________
Use the following words or phrases to complete the table below. Words or phrases can be used
more than once.
Excretory Products: Urea/Nitrogenous waste, Water, Salts, Water vapour, Heat, Bile
pigments,
How excretory products are removed from the body: Exhalation, Sweating, Urination,
Excretory products made here are transported to the kidneys and gut,
What reactions cause the different excretory products to be formed: Respiration,
Deamination of amino acids, Breakdown of haemoglobin, Nutrient metabolism, General
metabolism.
Table comparing the different ways that Excretion occurs in animals
Organ
Kidney
Lung
Skin
Liver
Excretory
products
How excretory
products are
removed from the
body
Name: ____________________________
Use the following words or phrases to complete the table below. Words or phrases can be used
more than once.
Excretory Products: Urea/Nitrogenous waste, Water, Salts, Water vapour, Heat, Bile
pigments,
How excretory products are removed from the body: Exhalation, Sweating, Urination,
Excretory products made here are transported to the kidneys and gut,
What reactions cause the different excretory products to be formed: Respiration,
Deamination of amino acids, Breakdown of haemoglobin, Nutrient metabolism, General
metabolism.
Table comparing the different ways that Excretion occurs in animals
Organ
Kidney
Excretory
products
Water,
Salts,
Urea
How excretory
products are
removed from the
body
Urination
Respiration,
Nutrient metabolism,
Deamination of amino acids
Lung
Carbon
dioxide,
Water
vapour
Exhalation
Respiration
Skin
Water,
Salts,
Urea,
Heat
Sweating
Respiration,
Nutrient metabolism,
Deamination of amino acids,
General metabolism
Liver
Urea,
Bile
pigments,
Excretory
products made
here are
transported to the
kidneys and gut