Page 45 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six
P. 45
Biology for Secondary Schools
The animal cell 4. Use a low-power objective lens
to observe the prepared slide.
Task 3.3
5. Draw what you have observed.
Search from reliable internet sources the 6. Search from the library, internet
simulations showing animal cells. Note sources and other biology books
FOR ONLINE READING ONLY
down what you have observed. the structures of human cheek
cells.
An animal cell is a type of eukaryotic 7. Compare what you have observed
cell that lacks cell wall and has true and what you have searched from
membrane bound nucleus. Figure 3.2 different sources with Figure 3.3.
shows the structure of an animal cell,
as seen under the light microscope.
Mitochondrion
Cytoplasm
Nucleus
Cell membrane
Figure 3.3: Human cheek cells
Figure 3.2: A generalised structure of an Question
animal cell Describe the structure of human cheek
cells.
Activity 3.2: Observing animal cells
Materials: Prepared slides of a cheek Functions of different parts of an
cell, a microscope, ICT tools, notebook, animal cell
and a pen or pencil
Task 3.4
Procedure Search information from biology books
1. Prepare the microscope with the and reliable internet sources on the parts
appropriate magnification power. of an animal cell and their functions.
2. Mount the prepared slide on the
stage of the light microscope. Cell membrane
The cell membrane is a thin layer
3. Use the microscope to focus on that encloses the whole cell. The cell
different areas of the slide. membrane is made up of two layers
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