Reproduction

1
Reproduction

• S1 Science
• Revision

2
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.

3
Part 1 Cells

• Youll 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

4
The animal cell
Nucleus
Cell Membrane
Cytoplasm
5
The plant cell
Cell Membrane
Nucleus
Vacuole
Chloroplast
Cell Wall
Cytoplasm
6
Functions of the cell parts
Cell part Function
Cell wall
Cell membrane
Vacuole
Nucleus
Cytoplasm
Chloroplasts
Maintains shape of cell
Allows substances to enter and leave the cell.
Contains cell sap and water
Controls what happens in the cell.
Is the site of cell reactions
Contains green chlorophyll for making food
7
Groups of cells

• Groups of cells that do the same job are called _
  _ _ _ _ _ _
• Take five minutes to do the revision exercise on
  cells. If youve done it already, learn the
  parts and their functions!

t i s s u e s
8
Human Reproduction

• Youll 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.

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Human Reproduction continued

• You should be able to
• and

10
The female reproductive system
oviduct
Carries the ovum to the uterus
ovary
Makes the ova
vagina
uterus
Will contain the growing embryo
Receives sperm from the penis
11
The male reproductive system
sperm tube
Carries the sperm to the penis
penis
Delivers sperm to the vagina
testes
Creates the sperm
12
Fertilisation
o v i d u c t

• Fertilisation occurs in the _ _ _ _ _ _ _ when
  the _ _ _ _ _ and the _ _ _ _ meet.
• The fertilised ovum is called a _ _ _
  _ _ _.
• As it travels to the uterus, it continues to
  divide until its a _ _ _ _ of _ _ _ _ _ called
  an _ _ _ _ _ _.

s p e r m
o v u m
z y g o t e
b a l l
c e l l s
e m b r y o
13
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
14
Human reproduction

• Take ten minutes to complete the revision
  exercises in your workbook. If you dont finish
  them you can do them at home.

15
Plant reproduction

• Youll 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

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Parts of a flower
petal
stigma
anther
style
ovary
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The functions of the parts
Part Function
stigma
style
ovary
petal
anther
Receives the pollen
Positions the stigma
Creates the ovules
Attracts insects
Creates the pollen
18
Pollination

• There are two types of pollination _ _ _ _
  and _ _ _ _ _ _.
• Insect pollinated plants have _ _
  _ _ _ _ _ _ coloured petals and a sweet smell.
  Their stigma is _ _ _ _ _ and the anthers are _ _
  _ _ _ _ the flower.
• Wind pollinated plants have small, _ _ _ _
  petals and _ _ _ _ _ _ _ _ stigmas. They have no
  scent and the anthers hang _ _ _ _ _ _ _ the
  flower.

w i n d
i n s e c t
b r i g h t l y
s m a l l
i n s i d e
f e a t h e r y
d u l l
o u t s i d e
19
Fertilisation

• The male sex cell in plants is the _ _ _ _
  _ _ and the female sex cell is the _ _ _ _ _.
• When the pollen lands on the stigma it forms a _
  _ _ _ _ _ _ _ _ _ to take the pollen to the
  ovary.
• The fertilised ovule or _ _ _ _ _ _ becomes the _
  _ _ _. The ovary becomes a _ _ _ _ _.

p o l l e n
o v u l e
p o l l e n t u b e
z y g o t e
s e e d
f r u i t
20
Seed dispersal
Seed Dispersed by? Why?



Animals (internal)
Fruit is eaten by animals.
Animals (external)
Hooks catch onto fur.
Seed catches the wind.
Wind.