Topic 16 Pt3- babies And Period Flashcards
Briefly describe the early development of an embryo
“After fertilisation a zygote is formed
The zygote implants in the uterus wall and becomes an embryo”
What is the function of the umbilical cord?
“It delivers oxygenated blood and nutrients to the developing foetus
It removes deoxygenated blood and waste products from the developing foetus”
What is the function of the placenta?
“To allow the removal of waste gases and excretory products from the foetus
To act as a barrier for toxins and pathogens
To provide the foetus with dissolved nutrients
What is the function of the amniotic sac and amniotic fluid?
They help to protect the developing foetus
Allows movement
Supports foetus
Describe the growth of the foetus over time
“The foetus begins by developing and becoming more complex
In the later stages of pregnancy, the foetus increases in size”
What role does testosterone play during puberty?(4)
“Triggers growth and development of the penis and testes
Causes the voice to deepen
Triggers the growth of pubic hair
Increases muscle mass”
What role does oestrogen play during puberty?
“Increases breast size
Triggers the development of the uterus
It causes eggs to mature during the menstrual cycle “
Where is oestrogen secreted from?
Ovaries
Where is progesterone secreted from?
The ovaries
What happens on day 1-4 of the menstrual cycle?
The uterus lining is shed during menstruation
FSH
What happens on day 4-14 of the menstrual cycle?
The uterus lining then begins to grow again in preparation to receive an egg
Oestrogen
What happens on day 14 of the menstrual cycle?
An egg is released
LH
What happens on day 14-28 of the menstrual cycle?
Lining of uterus mantained
Progesterone
What does follicle stimulating hormone (FSH) do?
Causes follicle to mature
Stimulates release of oestrogen
What does luteinising hormone (LH) do?
Triggers ovulation (egg released from follicle)
Triggers remainder of follicle to become corpus luteum
