Lesson Starter 1 What is pollination 2 What

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Lesson Starter 1. What is pollination? 2. What are the differences between wind and

Lesson Starter 1. What is pollination? 2. What are the differences between wind and insect pollinated plants? 3. What does the ovule become after fertilisation? 4. What does the ovary become after fertilisation?

Sexual & Asexual reproduction Lesson 4

Sexual & Asexual reproduction Lesson 4

Lesson 4 - learning intention • Sexual reproduction in mammals • Label the male

Lesson 4 - learning intention • Sexual reproduction in mammals • Label the male and female reproductive organs • Discuss fertilisation in animals

Sexual reproduction • Almost all animals reproduce sexually (including humans) • Sexual reproduction involves

Sexual reproduction • Almost all animals reproduce sexually (including humans) • Sexual reproduction involves sex cells (gametes) What are the sex cells in humans?

Sexual reproduction: Copy • Almost all animals reproduce through sexual reproduction which involves sex

Sexual reproduction: Copy • Almost all animals reproduce through sexual reproduction which involves sex cells (gametes) • In humans the male sex cell is the sperm and the female sex cell is the egg

Human sex cells

Human sex cells

Human sex cells Head Nucleus Cell membrane Nucleus Sperm Tail Egg Cytoplasm containing food

Human sex cells Head Nucleus Cell membrane Nucleus Sperm Tail Egg Cytoplasm containing food Draw amd label the diagrams in your jotter

Fertilisation • More detail later • Fertilisation will occur when the nucleus of the

Fertilisation • More detail later • Fertilisation will occur when the nucleus of the sperm cell fuses with the nucleus of the egg cell, forming a zygote. • In humans, fertilisation happens in the oviduct (aka fallopian tube)

Reproductive organs • Both male and females have different reproductive organs • Each part

Reproductive organs • Both male and females have different reproductive organs • Each part has a different job to do

The male reproductive organs

The male reproductive organs

The male reproductive organs: stick in jotter & label

The male reproductive organs: stick in jotter & label

Complete Structure Function Deposits sperm in the female Testes Sperm duct

Complete Structure Function Deposits sperm in the female Testes Sperm duct

Complete Structure Function Penis Deposits sperm in the female Testes Sperm is produced Sperm

Complete Structure Function Penis Deposits sperm in the female Testes Sperm is produced Sperm duct Carries sperm from testes to penis

The female reproductive organs

The female reproductive organs

The female reproductive organs

The female reproductive organs

Complete Structure Oviduct Ovary Function Fertilised egg implants into lining and foetus develops here

Complete Structure Oviduct Ovary Function Fertilised egg implants into lining and foetus develops here Receives sperm from the male

Complete Structure Oviduct Ovary Uterus (womb) Vagina Function Where fertilisation occurs Produces egg cells

Complete Structure Oviduct Ovary Uterus (womb) Vagina Function Where fertilisation occurs Produces egg cells Fertilised egg implants into lining and foetus develops here Receives sperm from the male

Animal Fertilisation • Fertilisation is when the nucleus of the egg and nucleus of

Animal Fertilisation • Fertilisation is when the nucleus of the egg and nucleus of the sperm FUSE together- a zygote is formed • The zygote contains a full set of chromosomes- half from the sperm and half from the egg

Watch the video explaining how fertilisation happens in humans http: //www. bbc. co. uk/education/clips/zsrg

Watch the video explaining how fertilisation happens in humans http: //www. bbc. co. uk/education/clips/zsrg 9 j 6

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