Importance of excretion

1.

Importance of excretion

2.

Lesson objectives
Describe the meaning of excretion in
living organisms.

3.

What is the excretion?
Excretion is a process of
producing and excreting
special materials
removing waste products.

4.

What is the function of
excretion?
Excretion
helps to keep
homeostasis.
Homeostasis
is the internal
body balance.

5.

Excretory substances in plants:
Water
CO2
O2
Salts (тұздар, соль)
Gums, resin (шайыр, смола)
Latex (сүтшырын, млечный сок)
Nectar

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13.

Excretory substances in
animals
Water
CO2
Salts (тұздар, соль)
Bile (өт, желчь)
Urea (зәр, моча)
Uric acid (мочевая кислота, зәр
қышқылы)

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18.

Let’s do the activity on p. 73

19.

Homework
Read p.72-73
Literacy on p. 73
New words