11
There are many types of cells in multicellular organisms. Each type has a specific
function and a unique appearance. Here are three examples.
Red blood cells
They are at and circular.
They carry oxygen from
the lungs to the muscles
and organs.
Nerve cells
They are star–shaped. They
transmit nerve impulses
from di erent parts of the
body to the brain.
Reproductive cells
They enable us
to reproduce.
Female
reproductive
cells are
spherical. Male
reproductive
cells are oval
with a long
tail for
swimming.
2
Copy and complete the sentences in your notebook.
a)
Tissues are made up of…
c)
Systems are…
b)
Organs are…
d)
Cells can have different…
3
7
What organs do we use for interaction? Listen and write the organs.
4
Find out more about human organs. Choose an organ and answer the questions.
liver stomach brain skin heart bladder
a)
What is the function of this organ?
b)
What system does this organ belong to?
5
Make a poster about the organ you chose in Activity 4. Include the following:
a)
a description of its function
b)
its location in a human being
c)
a picture of the system that the organ belongs to
d)
examples of other living things that have this organ: include pictures
6
8
QUIZ
Check your learning.
A
C T I V I T I E S
