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Chapter 39

Revise the Human Reproductive System

Can you give the function of the testes? To produce and hold the sperm and male hormones.
Can you give the function of the scrotum? To keep the testes at the right temperature.
Can you give the function of the sperm ducts? To carry the sperm from the testes to the penis.
Can you give the function of the penis? To deliver sperm into the woman's body.
Give the function of the uterus? To hold the baby during pregnancy.
Give the function of the fallopian tubes? To carry the egg toward the womb and allow fertilisation.
Give the function of the cervix? The entrance to the womb.
Give the function of the vagina? To hold the penis during intercourse and allow childbirth.
Give the function of the ovaries? To produce eggs and female hormones.
What is the average length of the menstrual cycle? 28 days.
Describe the menstruation stage of the menstrual cycle. Days 1-5 period occurs. Days 6-13 The lining of the womb builds up with blood.
Describe the ovulation stage of the menstrual cycle. Days 13-15 an egg is released from the ovaries.
Describe the development of lining of womb during the menstrual cycle. Days 15-28 The lining of the womb continues to fill with blood and then breaks down.
What is the fertile period of the menstrual cycle? When the egg is released from the ovaries.
At what stage does the fertile period occur in the menstrual cycle? Days 11-17.
What is sexual intercourse? During sexual intercourse the man places his penis into the woman's vagina. This results in ejaculation which can lead to conception.
What are the male gametes in humans? Sperm.
What are the female gametes in humans? Eggs.
What is fertilisation? When a sperm and a egg come together.
What does the fertilisation of the sperm and egg result in? A zygote.
What does a zygote develop into? An embryo.
Define Pregnancy. Pregnancy lasts from conception to birth, during this time a baby is forming inside her womb.
How long does the average pregnancy last? 9 months.
What is the placenta and what is its function? It supplies nutrients to the baby and takes away the waste. it also stops the mothers and babies blood from mixing.
What is puberty? Puberty is when a person starts to sexually develop.
What is contraception? Contraception is used to stop conception during intercourse.
What are the two main types of contraception? Condoms, Contraceptive pill.
Define genetics. Genetics is the study of heredity.
What are inherited characteristics? Characteristics that are passed on from parents.
What controls our inherited characteristics? Our genes.
What are non-inherited characteristics? Characteristics that we learn.
What is a chromosome? A molecule of DNA.
Where are chromosomes found in the cell? Inside the nucleus.
What is the standard number of chromosomes in a human? 46 (23 pairs).
What are the two substances that chromosomes are made of? DNA and Protein.
Created by: SC Dave