What is the human male gamete called?
How often does a young woman ovulate?
Every 28 days
What is the process called when gametes join together?
Where are sperm produced?
What is the part of the sex cell called where the genes from two parents are carried
What is the stage of human development called where a person can become able to reproduce?
When two sex cells join together what is it known as?
What is the part of the body where substances can be exchanged between a pregnant woman and her developing baby.
Growth and development are controlled by what chemicals?
The length of time between fertilisation and birth is called what?
A chemical called testosterone is produced in a boys body from adolescence onwards. The chemical causes certain changes in the boys body. Where is the chemical produced.
In the testes
Describe changes caused by testosterone.
growth of facial hair
why would a pregnant woman need to ensure that she has plenty or iron and calcium in her diet.
Iron for red blood cells, calcium for bones and teeth (for developing fetus as well as for woman)
Mothers who smoke during pregnancy risk harming their babies. Tobacco smoke contains many chemicals including nicotine and carbon monoxide (this gas combines with red blood cells). Explain how these things might cause damage to the developing fetus.
Nicotine - causes baby to have faster heart rate and baby can be born addicted to nicotine
Carbon monoxide - causes less oxygen to be carried by the red blood cells so the baby can have slower respiration and less energy for growth.
Give two reasons why sperm is adapted to its function.
tail for swimming
nucleus carrying father's genes
What is the name of the ball of cells which become embedded in the thickened wall of the uterus after fertilisation has occurred?
What is this process called?
Once conception has been successfully completed what is the new structure called with links the mother to her developing baby?
Complete the sentence below..
One of the ......... releases and egg cell (ovum) every ........ If there is no fertilisation, or ghe fertilised egg does not stick to the lining of the womb, then .......... occurs. When this process occurs, a woman loses ..... this is often called 'having a ..............
Between what days does ovulation take place
Around day 13 to 15
Between what day is the uterus lining lost?
Days 1 - 4
What days is fertilisation most likely to happen?
Day 14 - 17
What is the function of the amniotic fluid around the fetus?
Protection against damage/drying out
The pregnant woman sometimes has craving for particular foods. Many women like to have milk chocolate which contains a lot of sugar. Explain in detail how the sugar reaches the developing fetus while the fetus is inside its mother's uterus?
An explanation should contain the following points int he correct order:
1. Digested in small intestine
2. Absorbed into blood
3. Transported in blood across placenta and along umbilical cord.
What is the normal length of pregnancy in human months?