Reproduction And Genetics Flashcards
Ovaries
Store and release eggs
Fallopian tube
Carries the egg to uterus
Uterus
Where the egg is fértiles
Cervix
Leads the vagina to the uterus
The vagina
Holds the male penis during sexual intercourse
Ovulation
And egg is released from the ovary an average of every 28 days
The egg
The egg is released on day 13-15 of the menestral cycle
Menstruation/ period
The lining and a small amount of blood pass out through the vagina (day 1-5)
Fertile period
These are the days of the menstrual cycle when the women is most likely to become pregnant
Menopause
Signals the end of a females ability to reproduce and also the end of her menstrual cycle ages for different people typically in the late 40’s
Testes
They produce sperm
Scrotum
Where the testes are
Epididymis
Is a coiled tube on the outside the testis
Vas deferens
Bring the sperm from the testicals to the penis
Seminal vesicles prostate gland Cowper
Produce seminal fluid which mixes with the sperm to form semen
The penis
Enters female and ejacualtes semen
Puberty
Describes when the body starts becoming sexually mature
Male puberty
In males sex hormones (testosterone) are released causing the voice to deepen hair grows around the sex organs face chest and underarms the testes and penis grow bigger
Female puberty
In females when the sex hormones are released the Breasts develops hips widen and hair begins to grow
intercourse
The man’s penis fills with blood and becomes hard enough to me be placed in a woman’s vagina
Semen
A mix of sperm cells and seminal fluid is released into the vagina during intercourse
The sperm
The sperms swims up into uterus and into the Fallopian tube
Fertillsation
If an egg is present in the tube and a couple have sexual intercourse then one of the sperm cells may fuse with it
Fertilised egg
The nuclei of the sperm and egg fuse together the women would be pregnant
Zygote-embryo- foetus
Zygote goes to a embryo and after 8 weeks it goes to a foetus
Implantation
When the embryo attaches to the lining of the lining of the uterus
Length pregnancy
The average length of pregnancy is 40 weeks
Amniotic fluid
As the embryo develops in the uterus it is protected inside a bag of fluid and provides a cushion for the embryo
Umbilical cord
A tube joining the embryo to the placenta
Placenta
Is rich in blood cells
Labour
The birth of a baby begins when the uterus muscles start to contract
Water breaks
The bag of amniotic fluid bursts and further contractions begin
Family planning
To control the number of children you have u need to control the number of times fertility takes place
Condom
Prevents sperm entering the vagina
Contractive pill
Prevent ovulation
Reliability
They are all not 100% accurate all the time
Genetics
The study of characteristics
Inheritable characters
Many physical characteristics such as eye colour and shape of ears of ears were inherited form your parents
Chromosomes
The nucleus of each sex cell ( gamete) contain 23 thread like structures called chromosomes
Genes
Chemicals found chromosomes that pass on info form parents to children
DNA
Deoxyribonucleic acid
46 chromosomes
When an egg and sperm cells fuse ( each has 23 chromosomes ) they give the individual they are creating 46 chromosomes
Homozygous
When two things match each other like eyes
Hetrozygous
When allies are different to each other
Dominent
So when a genetic dominates the other like eye colour
Recessive
relating to or denoting heritable characteristics controlled by genes which are expressed in offspring only when inherited from both parents.
Biodiversity
There are many different types of living things
Fossils
The remains of very ancient living things
Extinct
Some living things disappear
Natural selection
How things variety of living thing may have arisen the most widely accepted explanation based on evidence on the theory of evaluation by natural selection
Species
A group of living things that can reproduce it self to reproduce an offspring which themselves can reproduce
Mutation
A change in gene
Evolution
The process by which different kinds of living things that develop from earlier forms of living things develop from earlier forms by genetics changes over a long period of time
Adaptation
A characteristic that helps an organism to survive and reproduce
