REPRODUCTION - ANIMALS Flashcards
Name this type of cell
sperm cell
Name this type of cell
egg cell
Where are egg cells produced?
ovaries
Where are sperm cells produced?
Testis / Testicles
Describe 3 adaptations of a sperm cell to help it swim to the egg cell
- tail
- streamlined - uses less energy to swim
- mitochondria - to produce energy to swim
why egg cells are so large
- bigger target for sperm cell
- contains a food store
What reproductive process is shown?
fertilisation
What is implantation?
embryo implants = sticks to the wall of the uterus
What is the name & role of A?
testes
produce sperm cells
What is the name & role of B?
sperm duct
carries sperm from testes to the penis
What is the name & role of D?
urethra
carries urine & sperm out of the body
What is the name & role of 1?
vagina
where the penis enters the female to
release sperm cells during sex
What is the name & role of 2?
cervix
a ring of muscle to keep baby in place
What is the name & role of 4?
uterus / womb
a muscular bag where baby develops until birth
What is the name & the role of 7?
two ovaries
contain undeveloped egg cells
one egg cell is released monthly
What is the name & role of 5?
two oviducts
tubes that carry the monthly egg cell to the uterus
Name 8 physical changes that happen to boys during puberty
- voice breaks / changes
- penis and testes grow (produce sperm cells)
- grow facial hair
- shoulders widen
- grow pubic and underarm hair
- grow taller
- body odour
- emotional changes
Name 7 physical changes that happen to girls during puberty
- grow breasts
- start periods (ovaries release egg cells)
- grow pubic and underarm hair
- grow taller
- hips widen
- body odour
- emotional changes
Name 4 substances that pass through the placenta to feed a developing baby
- food
- nutrients
- water
- O2
What happens during menstruation?
uterus lining breaks down and flows out of the vagina
What happens during ovulation?
an ovary releases one egg cell
How long is the menstrual cycle?
28 days
On which day of the menstrual cycle is ovulation (egg release)?
day 14 (half way through)
Name this cell & its role?
ciliated cell
sweeps the egg down the oviduct towards the uterus
what causes puberty?
sex hormones: chemical messengers that travel around your body in your blood and trigger all the changes
what are gametes?
reproductive cells = egg cells and sperm cells
what component of the egg cell and sperm cell join at fertilisation
nucleus
