Transcript Revision powerpoint for S1 Reproduction topic

Reproduction
S1 Science
Revision
The Course
This course is made up of three
sections:
Cells – the structure of plant and animal
cells
Human reproduction
Plant reproduction
The test will cover all three sections.
Part 1: Cells
You’ll have to know:
The parts of an animal cell
The parts of a plant cell
The function of each part
You should be able to:
The animal cell
Nucleus
Cell Membrane
Cytoplasm
The plant cell
Nucleus
Chloroplast
Cytoplasm
Cell Membrane
Vacuole
Cell Wall
Functions of the cell parts
Cell part
Function
Cell wall
Maintains shape of cell
Cell membrane
Allows substances to enter and
leave the cell.
Vacuole
Contains cell sap and water
Nucleus
Controls what happens in the
cell.
Cytoplasm
Chloroplasts
Is the site of cell reactions
Contains green chlorophyll for
making food
Groups of cells
Groups of cells that do the same job
su
are called _t _i s_ _
_e
_s
_
Take five minutes to do the revision
exercise on cells. If you’ve done it
already, learn the parts and their
functions!
Human Reproduction
You’ll have to know:
How to label the parts of the male and
female reproductive organs
What the different parts do in these
systems
What happens at fertilisation
How to label parts of the foetus and the
uterus during pregnancy
What the different parts do.
Human Reproduction continued
You should be able to
and
The female reproductive system
oviduct
Carries the ovum
to the uterus
ovary
Makes the ova
vagina
Receives sperm
from the penis
uterus
Will contain the
growing embryo
The male reproductive system
sperm tube
Carries the sperm
to the penis
penis
Delivers sperm
to the vagina
testes
Creates the
sperm
Fertilisation
Fertilisation occurs in the _o _v _i d_ u
_ c_ t_
rm
when the s
_p
_e
__
_ and the o
__
_
v _u m
meet.
The fertilised ovum is called a
_ _o _t e
_.
z_ y_ g
As it travels to the uterus, it continues
to divide until it’s a b
_ _a _l _l of _c _e _l _l s_
called an e
_ mb
_ _ _r y
_o
_.
Pregnancy
Uterus wall
Contains the
embryo
Placenta
Allows food and
oxygen to pass to the
embryo
Umbilical cord
Joins the embryo
to the placenta
Amnion
Protects the
embryo
Human reproduction
Take ten minutes to complete the
revision exercises in your workbook.
If you don’t finish them you can do
them at home.
Plant reproduction
You’ll have to know:
How to label the parts of a flower
What the functions of the parts are
A bit about wind and insect pollination
Fertilisation in plants
How seeds are dispersed.
You should be able to:
Parts of a flower
stigma
petal
anther
style
ovary
The functions of the parts
Part
Function
stigma
Receives the pollen
style
Positions the stigma
ovary
Creates the ovules
petal
Attracts insects
anther
Creates the pollen
Pollination
There are two types of pollination:
_ _i n
_d
_ and _i n
_s
_e
_c
_ _.
w
t
Insect pollinated plants have
_
_ _t _
b _r _i g_ h
l y_ coloured petals and a
sweet smell. Their stigma is sma
_ _ _ _l l_
and the anthers are _i n
_s
__
i d_ e_ the
flower.
Wind pollinated plants have small,
_u
_ _l l_ petals and _f e
__
a _t _h _e _r _y
d
stigmas. They have no scent and the
anthers hang o
_u
_ _t _
__
s _i d
e the flower.
Fertilisation
The male sex cell in plants is the
_o
_ _l _l e
__
p
n and the female sex cell is
the o
_v
_u
_ _l e
_.
When the pollen lands on the stigma
it forms a p
_o
_ _l _
l e_ _n _t u_ _b _e to take
the pollen to the ovary.
The fertilised ovule or z
_y
__
_
g _o _t e
becomes the s
_e
_e
_d
_. The ovary
becomes a _f _
_ _i t_.
ru
Seed dispersal
Seed
Dispersed by?
Why?
Animals
(internal)
Fruit is eaten
by animals.
Animals
(external)
Hooks catch
onto fur.
Wind.
Seed catches
the wind.