7 - BIOLOGY - HUMAN BIOLOGY Flashcards
(26 cards)
What is Fertilisation?
It is the joining of genetic material in a sperm and an egg
What is puberty?
It is to change the body to get ready for reproduction
What happens to girls during puberty?
Growth spurt
Pubic hair grows
Breasts grow
Menstrual cycle begins
Hips widen
What happens to boys during puberty?
Growth spurt
Pubic hair grows
Voice deepens
Sperm production starts
Sex organs grow bigger
How many days does the menstrual cycle take?
28
What is menstruation?
It is when the uterus lining sheds; it lasts about 5 days
What is the menstrual cycle preparing a woman for?
Pregnancy
What day is ovulation?
14
Where does the baby develop after the woman is pregnant?
The uterus
What is the fluid that surrounds the baby inside the uterus to cushion it?
Amniotic
How does the baby get nutrients and oxygen?
Via the placenta and umbilical cord
What job does the placenta and umbilical cord do?
It supplies oxygen and nutrients to the baby but also removes its waste
How long does pregnancy last for?
9 months
What do the muscles in the uterus do to help push the baby through the cervix and vagina?
Contract
What does a petal do?
It attracts insects
What does an anther do?
Produces pollen
What does the stigma do?
It has a sticky surface and it receives and traps the pollen
What does the style do?
It holds the stigma up and connects it to the ovaries
What does the ovary contain?
Ovules
What is pollination?
It is the transfer of pollen between one flower to another
What can pollen be carried by?
Wind and insects
What does the pollen do in plant reproduction?
It fertilises the eggs which will develop into seeds
What are the different types of seed dispersal?
Water
Animal
Explosion
Wind
What is reproduction called when only one parent is required?
Asexual
