Section 7 - Reproduction and Inheritance 2 Flashcards Preview

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Flashcards in Section 7 - Reproduction and Inheritance 2 Deck (47)
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1

What are sperm, where are they made and when (3)

- Male gametes

- Made in the testes

- All the time after puberty

2

Sperm mix with a liquid to form .... , which is ejaculated from the ........ to the .......... of the female during sexual intercourse

semen

penis

vagina

3

4

What is 1 and what is its purpose (2)

- Bladder

- Stores urine

5

What is 2 and what is its purpose (2)

- Glands

- Produce the liquid that's added to sperm to make semen

6

What is 3 and what is its purpose (3)

- Sperm duct (vas deferens)

- Muscular tube 

- Carries sperm from testis towards the urethra

7

What is 4 and what is its purpose (3)

- Urethra

- Tube which carries sperm through the penis during ejaculation

- Urine also passes through the urethra before leaving the body

8

What is 6 and what is its purpose (2)

- Testis

- Where sperm is made

9

What is 8 and what is its purpose (2)

- Scrotal sac/scrotum

- Hangs behind the penis and contains the testis

10

What is erectile tissue (1)

- Swells when filled with blood, making the penis erect

11

12

What are female gametes (1)

- Ova

13

How and when is an ovum produced (2)

- Every 28 days

- From one of the two ovaries

14

What happens once an ovum is produced (2)

- Passes into the fallopian tube

- Might meet sperm that have entered the vagina during sex

15

What happens if an ovum isn't fertilised by sperm (2)

- Ovum will break up

- And pass out of the vagina

16

What happens if the ovum is fertilised (2)

- Ovum starts to divide

- New cells will travel down the Fallopian tube to the uterus

- Attaches tp endometrium (uterus lining)

- Fertilised ovum develops into an embryo

17

18

What is 1 and what is its purpose (2)

- Ovaduct (Fallopian tube)

- Muscular tube that carries the ovum from the ovary to the uterus

19

What is 2 and what is its purpose (2)

- Ovary

- The organ that produces ova and sex hormones

20

What is 3 and what is its purpose (2)

- Uterus (womb)

- The organ where an embryo grows

21

What is 4 and what is its purpose (2)

- Cervix

- Neck of the uterus

22

What is 5 and what is its purpose (2)

- Bladder

- Stores urine

23

What is 6 and what is its purpose (2)

- Urethra

- Organ where an embryo grows

24

What is 7 and what is its purpose (2)

- Vagina

- Where sperm are deposited

25

What are the sex hormones in men and women (2)

Men - testosterone

Women - oestrogen

26

What 4 things does oestrogen in women cause (4)

- Extra hair on underarms and pubic area

- Hips to widen

- Development of breasts

- Ovum release and start of periods

27

What 5 things does testosterone in men cause (5)

- Extra hair on face and body

- Muscles to develop

- Penis and testicles to enlarge

- Sperm production

- Deepening of voice

28

What are stages 1 and 2 of the menstrual cycle (4)

- S1 : Day 1 is when bleeding starts

- Uterus lining breaks down for about four days

- S2 : The uterus lining builds up again 

- From day 4 to 14, devleops into a thick spongy layer of blood vessels ready to recieve a fertilised ovum

29

What are stages 3 and 4 of the menstrual cycle (4)

- S3 : An ovum develops and is released

- Released from the ovary at day 14

- S4 : The wall is maintained for about 14 days until day 28

- If no fertilised ovum has landed on the uterus wall by day 28, spongy lining starts to break down and cycle starts again

30