What can you remember from S1?
1
5
2
6
3
7
4
8
Which
systems
have we
learnt
about?
Which
system have
we learnt
about – but
is not here?
What do you already know?
Rotation Quiz
1. Name 2 sex cells. And say whether they are
2.
3.
4.
5.
6.
male/female.
Where are these sex cells made in the body?
What are gametes?
What is fertilisation?
Name 3 structures of the male reproductive
organs (there are more)
Name 3 structures of the female reproductive
organs (there are more)
Sperm
 The male sex cell of an
animal is a sperm.
 A sperm consists of a head
region and a tail which
enables it to move.
 The male animal produces
large number of sperm
Egg
 The female sex cell of an
animal is the egg.
 An egg is larger than a
sperm because in addition
to its nucleus it has a store
of food in its cytoplasm. It
lacks a tail and cannot
move by itself.
 The female produces a
smaller number of eggs.
Is another term for
SEX CELLS!
•Sperm is the
male gamete
•Eggs are the
female gamete!
Fertilisation
Fertilisation is the name given to the process
when a sperm’s nucleus enters the egg and fuses
with the egg’s nucleus to form a single cell
called a ZYGOTE.
Fertilisation
Male Reproductive Organs
 Male sex cells are
called sperm, which are
produced in the testes
 Sperm travels along the
sperm duct which
eventually joins a tube
that comes from the
bladder called the
urethra
Sperm duct
Female Reproductive Organs
 The female sex cells are
the eggs, which are
produced by the ovaries
 Eggs released from the
ovaries travel along the
oviducts, which leads to the
uterus
 The vagina is the tube in
which sperm is placed during
sexual intercourse. A baby is
born through here also.
 Fertilisation occurs in the
oviduct
X
After Fertilisation
arrives at
womb
many cells
continues
to divide
two cell
stage
cell divides
fertilised
egg
(zygote)
sperm
ovary
womb
Becomes
embedded in
the wall of the
womb
fertilisation
egg cell enters
oviduct
Tasks
1.
2.
Collect a blue standard grade textbook
Read pages 123-126
3.
Write the title Sex Cells
 Draw figure 13.1 (page 123)
 Write down 2 differences between the structure of the egg and
structure of sperm (page 123)
4.
Write the title Fertilisation
 write down the MEANING (page 123)
 Write down what a zygote is (page 123)
 Write down WHERE fertilisation in animals occurs (page 125)
Collect a worksheet from the front table
5.



Label it using pages 124 and 125 to help you
At a big X to where fertilisation takes place
Stick it into your jotter
Think/pair/share – 3 minutes!
Why is sexual reproduction
important?
 How many parents are involved in sexual
reproduction?
 Are you 100% identical to the person sitting
next to you?
 Why is this a good thing?
 If you were 100% identical to the person sitting
next to you, the human race would be all be the
same!
 If a virus affected one human and that person
died – what would happen to all the other humans?
Advantages to sexual
reproduction
 Sexual reproduction involves ___ parents.
 The offspring will therefore have a mixture of
characteristics from both ______
 This leads to an _______ in variety in a
species!
 It is important that organisms reproduce
because it ensures the ______ of the species!
Sexual reproduction helps to prevent the
species becoming ______.
Advantages to sexual
reproduction
 Sexual reproduction involves 2 parents.
 The offspring will therefore have a mixture of
characteristics from both parents
 This leads to an increase in variety in a
species!
 It is important that organisms reproduce
because it ensures the survival of the species!
Sexual reproduction helps to prevent the
species becoming extinct.