this is about cells structure and membranes details.

1. Unit 7L.1
Specialized Cells
Name:
Class: 7
animal
1 Al-Wakra Independent Preparatory School for Girls

2. What are cells?
Cells are the building blocks
of life.
They come in all shapes and
sizes.
Some organisms are made up
of only one cell and are called
uni-cellular.
Others are made up of lots of
cells and are called multi-
cellular.
Cells work together and carry
out the seven life processes
that are needed for an
organism to stay alive.2

3. plant cell
Animal and plant cells
Animal and plant cells come in
different shapes
and sizes, but they all have three basic
features.
animal cell
cytoplasm
cell membrane
nucleus
Plant cells also have some extra features
that make them different to animal cells.3

4. Cell membrane
Cells & their Function
Controls what
substances can get
into and out of the
cell.
Cytoplasm
Jelly-like substance,
where chemical
reactions happen. In
plant cells there's a
thin lining, whereas in
animal cells most of
the cell is cytoplasm.
4

5. Controls what happens
inside the cell - it is
not a 'brain'.
Chloroplast
Where photosynthesis
happens – chloroplasts
contain a green
substance called
chlorophyll.
Vacuole
Contains a liquid
called cell sap, which
keeps the cell firm.
Nucleus
Cell wall Made of a tough substance
called cellulose, which
supports the cell.
5

6. Compare a typical animal
cell and a typical plant cell
6

7. 7
Which parts of a plant cell are
the same as an animal cell?
_________________________
_________________________
Which parts of a plant cell are
not found in an animal cell?
_________________________
_________________________

8. Specialized Cells
Function
Red blood cells
To carry oxygen
Special
features
Large surface area, for
oxygen to pass through
Contains haemoglobin,
which joins with oxygen
Nerve cell
To carry nerve impulses to
different parts of the body
Function
Special
features
Long Connections at
each end Can carry
electrical signals
8

9. Male reproductive cell (sperm cell)
To reach female cell,
and join with it
Long tail for swimming
Head for getting into
the female cell
Function
Special
features
To absorb water and
minerals
Large surface area
Function
Special
features
Root Hair Cell
Leaf Cell
To absorb sunlight for
photosynthesis
Large surface area
Lots of chloroplasts
Function
Special
features9

10. Making a Slide of
Onion Cell
10

11. 11
Building blocks of life -
Cell-ebrate the Microscope
Cells could not have been discovered
without the invention of the
microscope.
“micro-” means”
small”,
“-scope” means
“looking at”.
A microscope allows us to look at very
small things by making them seem
bigger. It magnifies tiny details and
makes them visible to the human eye.

12. Making a Model of
Animal or Plant Cell
12

13. Name a cell that would
be suitable for each job
13

14. 14