Human Reproduction And Genetics Flashcards
Ovaries
Store and release eggs
Fallopian tubes
Carry the egg to the uterus,fertilisation occurs here
Uterus (womb)
Is where the fertilised egg becomes implanted and finds nourishment
Cervix
Leads from the vagina to the uterus
Vagina
Holds the male penis during sexual inter course forms the birth canal during childbirth
Gamete
Is a sex cell
Male gamete
Is the sperm
Female gamete
Is the egg/ ovum
Testes
Produce sperm
Spermicide duct
Brings the sperm from the testes to the penis
Glands and vesicles
Produces seminal fluid which mixes with sperm to form semen (allows sperm to swim)
Penis
Enters the female and ejaculates semen
Ovulation
An egg is released from the ovary an average of every 28 days
Menstruation
The lining and a small amount of blood pass out through the vagina
Fertile period
These are the days of the menstrual cycle when the woman is most likely to become pregnant
Puberty
Describes when the body starts becoming sexually mature
Copulation
Is another name for sexual intercourse
Fertilisation
The fusing of the gametes to form a zygote
Zygote
Egg and sperm fuse to form a single cell
Embryo
Division of the zygote occurs and it grows. Attaches to the lining of the uterus(implantation)
Foetus
After 8 weeks looks like a human
Implantation
Occurs when the fertilised egg lodges itself on the lining of the uterus
Pregnancy
Is 40 weeks
Amniotic fluid
As the embryo develops in the uterus it is protected inside a bag of fluid
Umbilical cord
A tube joins the embryo to the placenta
Placenta
Food, oxygen, wastes and carbon dioxide are swapped between the mother and baby. Bold does not mix
Family planning
To control the number of children you have, you need yeti control the number of times fertilisation takes place
Natural methods of contraception
Aim to detect the day ovulation takes place and avoid intercourse during the fertile period
Artificial methods of contraception
Prevents the sperm and egg meeting
E.g. Condom which prevents sperm entering the vagina
E.g. Contraceptive pill with prevents ovulation
Abstain
It’s is important to realise no method is 100% reliable, to abstain from sex (to not have sexual intercourse) is the only way to avoid pregnancy
Condoms
-Prevents pregnancy
-They can also prevent the spread of
Sexually transmitted diseases (std’s) or
Sexually transmitted infections (sti’s) e.g. Syphilis, hiv (aids), chlamydia
Responsible attitude to sexual intercourse
Could use condoms and another form of contraception e.g. The pill to prevent pregnancy and spread of disease
A women is most likely to become pregnant during the middle of her menstrual cycle
That is when the egg is released
Sperm are not formed if the testes are located inside the male body
The sperm needs to be cooler to form properly
During the pregnancy the woman does not have a period
The lining of the womb acts to nest the baby, and stays inside
A baby in the womb does not breath through its lungs
Oxygen is passed through the placenta and the umbilical cord
If a pregnant woman smokes or drinks or drinks her baby may be harmed
Everything that the mother eats etc. Goes into the her placenta
Breast-fed babies tend to get fewer infections than bottle-fed babies
Baby will be used to the mother’s immune system, and will get a lend of her ability to fight off until their own immune system is made
A placenta is essential for the development of a baby
Food and oxygen pass from the placenta along umbilical cord
Sperm have tails
Need to swim to the egg
Ovulation
An egg is released from the ovary an average of every 28 days
Menstruation
The lining and a small amount of blood pass out through the vagina
Fertile period
These are the days of the menstrual cycle when the woman is most likely to become pregnant
Puberty
Describes when the body starts becoming sexually mature
Copulation
Is another name for sexual intercourse
Fertilisation
The fusing of the gametes to form a zygote
Zygote
Egg and sperm fuse to form a single cell
Embryo
Division of the zygote occurs and it grows. Attaches to the lining of the uterus(implantation)
Foetus
After 8 weeks looks like a human
Implantation
Occurs when the fertilised egg lodges itself on the lining of the uterus
Pregnancy
Is 40 weeks
Amniotic fluid
As the embryo develops in the uterus it is protected inside a bag of fluid
Umbilical cord
A tube joins the embryo to the placenta
Placenta
Food, oxygen, wastes and carbon dioxide are swapped between the mother and baby. Bold does not mix