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Biology KS3 > Human Reproduction > Flashcards

Human Reproduction Flashcards

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1
Q

Where is sperm made

A

Testes

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2
Q

What is a sperm and a ovum a type of

A

Cell and gamete

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3
Q

What liquid gets ejaculated from the penis

A

Semen

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4
Q

What is the function of Glands

A

To produce a liquid which is mixed with sperm to produce semen

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5
Q

Changes of puberty for boys

A

Sex organs get a bit bigger

Testes start to produce sperm and hormones

Public hair grows

Hair grows on the face chest armpits

Voice deepens

Behaviour changes

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6
Q

Puberty in girls

A

Ovaries start to release eggs

Ovaries start to produce hormones

Public hair grows

Menstruation starts

Breasts get larger

Behaviour changes

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7
Q

How many days is the menstrual cycle

A

28 days

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8
Q

Name the parts of the human reproductive system

A 
Urethra
Glands
Sperm ducts
Testes
Penis
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9
Q

Function of urethra

A

A tube which carries semen through the penis during ejaculation.Urine also passes through the urethra to exit the body

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10
Q

Function of glands

A

Produce liquids that’s mixed with sperm to produce semen

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11
Q

Function of testes

A

Produces sperm and hormones

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12
Q

Function of sperm duct

A

Muscular tube that carries sperm from testis towards the urethra

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13
Q

Name the female Reproduction system

A 
Oviducts
Ovaries
Uterus
Cervix
Vagina
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14
Q

In the female reproductive system,what is the function of a ovary

A

The organ that produces ova and hormones

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15
Q

Function of the uterus

A

A muscular organ which is where the offspring will be nourished and kept while Developing

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16
Q

Function of the cervix

A

Keeps the baby in place while pregnant

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17
Q

Function of vagina

A

Where sperm is deposited

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18
Q

Day 1 of menstrual cycle

A

Bleeding from the vagina/lining of the uterus breaks down to the vagina

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19
Q

Day 4 of menstrual cycle

A

Lining of uterus begins to build up again. It thickens into a spongy layer full of blood vessels ready for implantation

20
Q

Day 14 of menstrual cycle

A

Egg is released from ovaries of the female/day that the woman might be pregnant

21
Q

Day 28 of menstrual cycle

A

Wall remains thick for the fertilised egg. If not, the lining breaks down passing out of the vagina

22
Q

What happens if the egg is not fertilised

A

The cycle will restart

23
Q

Why does the lining of the uterus need to be thick

A

So it has a good blood supply

24
Q

How many chromosomes are there in 1 gamete

A

23

25
Q

Name the stages of the human reproductive system in order

A 
Ovulation
Copulation
Fertilisation
Cell division
Implantation
26
Q

What happens in ovulation

A

An egg is released from an ovary around day 14

27
Q

What happens in copulation

A

Millions of sperm are released from the mans penis into the woman’s vagina during intercourse

28
Q

What happens in fertilisation

A

Egg is fertilised when the nuclei of the egg and sperm join

It is now called zygote

29
Q

What happens in cell division

A

1 day after fertilisation the egg divide into 2 .After about 4 days the egg has divided into 32 cells

It is now called an Embryo

30
Q

What happens in Implantation

A

One week after fertilisation the embryo starts attaches itself into the lining of the uterus .When its completely attached it’s called IMPLANTATION

31
Q

When can you call the offspring a zygote

A

Once an egg is fertilised by a sperm

32
Q

When can you call the offspring an embryo

A

Once a ball of cells has formed/cell division

33
Q

Where does the placenta form

A

placenta forms between the embryo and the wall of the uterus.

34
Q

When can we call the embryo a foetus

A

6 weeks after fertilisation

35
Q

Name the 4 stages of the menstrual cycle

A

1.Lining of the uterus breaks down

2.Lining of the uterus
builds up

  1. Egg released
  2. Lining of the uterus maintained
36
Q

When does implantation occur

A

1 week after fertilisation

37
Q

What is gestation

A

When an embryo develops over about 9 months

38
Q

How do substances go to the foetus

A

The substances go with the mothers blood then through the placenta

39
Q

At 1 month for the embryo

A 
6mm long
Has:
Brain
Heart
Eyes
Ears
Legs
40
Q

At 9 weeks for the body

A

25mm
Completely formed

Now called a foetus

41
Q

At 3 months for the foetus

A

54mm

Looks more like a baby

42
Q

At 5 months for the foetus

A

160mm

It kicks and finger nails can be felt

43
Q

At 7 months for the foetus

A

370mm

Now Viable

44
Q

Viable meaning

A

Has a fair chance of surviving if it were born at this stage

45
Q

At 39 weeks for the baby

A

520mm

Fully developed and ready to be born

Biology KS3 (5 decks)

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