Human Reproduction Flashcards
What is menstruation?
When the uterine lining is not required so it disintegrates and passes through the vagina
What is ovulation?
Aids in the maturing of an egg every month
What is the process of ovulation?
- Egg is released
- Egg is fertilised
- Eggs travels down the Fallopian tubes
- Egg is implanted in the endometrium
What is ejaculation?
When the male penis becomes erect and releases semen into the vagina
What is fertilisation?
Where an egg cell in the Fallopian tube makes contact with the sperm cell
What is Implantation?
When the zygote enters the uterus where it implants in the endometrium and continues to develop into a foetus
What is the placenta?
The structure through which the foetus receives its nutrients and gets rid of its waste
How is the placenta used?
The blood from the foetus flows into the blood vessels in the placenta. Useful substances are carried to the foetus from the mother in the umbilical vein. The harmful substances pass into the mothers blood in the arteries for the mother to excrete them
What is respiration?
The breaking down of glucose to release energy so we can breathe
What is the function of the amniotic sac?
It develops around the foetus, keeps it at a constant temperature and protects the foetus from desiccation and injury
What is gestation and how long does it take?
Commonly known as birth. It is the period which an embryo/foetus develops inside the womb. It usually takes around 40 weeks
What are the 5 steps of birth?
- Labour - change in hormones and contractions happen
- Water breaks - amniotic fluid released and contractions intensify
- Birth - contractions ouch the baby out, baby’s skull and bones are not fused allowing for the bones to shirt making it easier to come out vagina
- Umbilical cord - clamped at birth (belly button)
- Postpartum - placenta breaks away from uterus wall and falls out
