BIO UGHUGHUGH

Question 1

How is the placenta adapted?

Answer 1

The placenta is adapted for nutrient and gas exchange between the mother and fetus through its extensive network of blood vessels.

Question 2

what causes puberty

Answer 2

sex hormones

Question 3

physical changes for girls

Answer 3

-breast development
-hips widen
-pubic hair
-release of egg cells by the ovaries

Question 4

physical changes for boys

Answer 4

-sperm produced
-shoulders broaden
-body becomes more muscular
-body hair (chest, face, pubic)

Question 5

adolescence vs puberty

Answer 5

adolescence is the period between childhood and adulthood and puberty is the physical changes that occur during this period

Question 6

how do sperm cells reach the egg cell

Answer 6

• During sexual intercourse, sperm travels up from the testes through the sperm duct
• receives nutrients and fluids from glands becoming semen
  -and through the urethra semen is released into the vagina.
  -sperm travels through vagina through cervix
• into the uterus
  -enters fallopian tube where fertilisation happens
• fuses with egg cell and is wafted down to the uterus to be implanted.

Question 7

what happens during implantation?

Answer 7

The embryo that has been wafted down by the cilia cells in the oviduct, attaches to the lining of the uterus and begins to develop into a baby.

Question 8

define gestation

Answer 8

the periood between fertilisation and birth is

Question 9

when is an embryo called a fetus

Answer 9

after 8 weeks

Question 10

placenta

Answer 10

An organ which allows the transfusion of substances pass between the mother;s blood and the fetus’s blood, It acts as a barrier, which stops infections and harmful substances from reaching the fetus.

Question 11

umbilical chord

Answer 11

connects fetus to placenta

Question 12

fluid sac

Answer 12

acts as shock absorber protecting fetus from any bumps

Question 13

at 4 weeks an embryo forms ___

Answer 13

spine and brain

Question 14

at 9 weeks a fetus

Answer 14

tiny movements happen and cheeks and lips can sense

Question 15

at 12 weeks a fetus

Answer 15

uses its muscles to kick, suck, swallow and practice breathing

Question 16

to grow, a fetus needs oxygen and _____ diffused from the mothers _____.

Answer 16

nutrients, blood

Question 17

what happens during birth

Answer 17

-after 40 weeks a baby is ready to be born.
-The mother’s cervix relaxes
- muscles in the uterus contract which pushes the baby through the vagina.

Question 18

day 1 of the menstrual cycle

Answer 18

blood from the uterus lining leaves the body through the vagina

Question 19

female sex hormones

Answer 19

estrogen and progesterone

Question 20

male sex hormone

Answer 20

testosterone

Question 21

what do male and female sex hormones do?

Answer 21

trigger different processes such as egg release and pubic hair growth.

Question 22

day 14 of the menstrual cycle

Answer 22

an egg cell is released from one of the ovaries.This is called ovulation

Question 23

fertilisation

Answer 23

when the male and female gametes fuse

Question 24

gametes

Answer 24

female and male sex cells (egg, sperm)

Question 25

what enables the production of egg cells and sperm cells?

Answer 25

sex hormones

Question 26

condoms

Answer 26

-thin layer of latex rubber
-barrier method, prevents semen from reaching the vagina
-also protects from STIs

Question 27

uterus adaptations

Answer 27

expands for baby to develop in there
contracts during birth to push baby out

Question 28

testes

Answer 28

produce sperm cells and male sex hormones

Question 29

ovaries

Answer 29

where eggs are produced

Question 30

how much does cervix dilate

Answer 30

10cm

Question 31

periods happen when

Answer 31

the lining of the uterus breaks down in preperation for potential pregnancy

Question 32

what happens for the zygote to become and embryo

Answer 32

cell division