What do all these have in common?
The very smallest living organisms are single cells which carry out all
The functions of living things. As organisms get bigger and are made
up of many cells, some of these cells become specialized to carry out
special jobs.
What is the picture?
What do you think these special cells do for plants
or animals?
Open a word document to take notes.
SPECIALISED CELLS
Learning Objectives:
1.
2.
3.
Learning Activities:
All must be able to
1.
describe with examples,
2.
how cells are specialised
to perform different
3.
functions.
Most should be able to
state how cells group
4.
together to form tissues.
Some could state how
5.
specific cells are adapted
to their function.
What is the picture?
Read what is a
specialised cell
Powerpoint showing
different specialised
cells
Note Making with
Word
Quiz on plant and
animal cells
WHAT IS A SPECIALIZED CELL?
 Plants
and animals consist of many cells and so
are known as multicellular
 They contain many different types of cells.
 Each type of cell is designed to carry out a
particular job or function.
 This is known as cell specialization
 Not all cells look the same.
 Some cells have a special shape and features to
help them do a certain job.
 Muscle cells have different structure to blood and
nerve cells in animals. In plants the cells where
photosynthesis happens are very different to root
hair cells.
Note Making Activity
1. The following slides show some examples of specialized
cells
2. Read through the information
3. Insert a table into your word document with 3 columns.
4. Title the first column Type of cell, the second column
Diagram, and the third column features/ job.
Type of Cell
Diagram
Features/jobs
•
Fill the columns with information from the slides. You
may have to read go back and read the slides more
than once to complete the table.
•
Save the document in your z-drive before the end of
class so you have it tomorrow.
SPERM CELL
Head contains enzymes & nucleus
Designed to Fertilise eggs.
Found in the Testes
Tail
A sperm is small and has a long
tail that provides movement so it
can swim and find an egg cell.
The head contains enzymes
which allow it to digest into an
egg cell and join with it.
EGG (OVUM) CELL
Cytoplasm containing yolk
 Designed
 Found
to be Fertilised.
in the Ovaries.
 An
egg cell is large and
bulky.
 Contains
Layer of jelly
Nucleus
yolk which
provides a large food store
for the new cell being
formed.
PALISADE CELL
 Designed
for
Photosynthesis
 Found
Nucleus
in the top of a leaf
 Tall
and has a large
surface area to absorb
water and minerals.
 Packed
with chloroplasts to
help make plant food.
Chloroplasts
CILIATED CELL

Designed to stop Lung
Damage

They line all the air
passages in the lungs.

They have tiny hairs called
cilia.

Hairs sweep mucus with
trapped dust and bacteria
back up the throat.
Nucleus
cilia
ROOT HAIR CELL
Designed for absorbing.
Vacuole
•Thin cell wall
makes it easy
for minerals to
pass through.
thin cell wall
•Has a large
surface which
helps it to
absorb water
and minerals.
Cell membrane
•Found in a plant root.
Muscle cell
Found in animals
nucleus
Long making it able to change
Shape. This is called contraction.
NERVE CELL (NEURONE)
Nucleus
•They are long
•They have connections at each end
•Can carry electrical signals
•Their job is to carry nerve impulses to different
parts of the body.
RED BLOOD CELL
•Designed to carry oxygen
•Found in blood.
•Large surface area, for oxygen to pass through.
•Contains haemoglobin, which joins with oxygen.
•Has no nucleus
Xylem cell
Found in a plant (the stem)
Join together to form xylem tubes that carry
water from roots to leaves of plants
Copy and fill in the gaps:
Some cells have special jobs to do. They often have special
shapes to help them do their job. We say that these cells
are _________________ to do their jobs.
A group of the same type of cells, all working together, is
called a _________________ .
A group of muscle cells all grouped together is called
_________________ . Muscle cells help us to
_________________ .
adapted
move
muscle
tissue
Task:
•
Finish your table, save
and print. Don’t forget to put
you name on your paper then
turn in to teacher.
•
Complete the homework
B2c/3 and B2c/4 (you can
answer directly on the sheets)