Sexual Reproduction
No description yet. This curated deck is ready for daily study.
Card preview (24)
How do sperm develop and and what happens when they have made tails
Sperm develop from cells in the tubules and once they have made tails they move down the center of the tubule and move into the epididymus
When is sperm produced and how
At puberty the Brain tells the testicles to produce testosterone and sperm
Explain the travel of sperm
Sperm travel to the epidydymas where they mature and travel. Through the vas deferens, past the prostrate gland and seminal vessels , through the urethra and spurted out at the tip of the penis.
What is the purpose of the male
To produce gametes or sperm and to transfer these to the female system
What do the testes look like
Oval structures, 5 cm long
Where are the 2 testes found and where is this found and why
In a sac called the scrotum found between the legs. Sperm are lower than body temp therofr they need to be kept outside of the body
What is a vasectomy
Sterilized man
What are the male secondary sex characteristics
Hair growth on the penis, arms and facial Descending of testes Voice depends Growth
What is the epdidymus
A tube attached to the outside of the testis. Sperm stored here after being formed
What is the vas deferens / sperm duct
A continuation of the epidydimus. Carries sperm from the epidymis to urethra
What are the seminal vesicles
Glands that produce a fluid which contains nutrients and enzhymes so that the sperm will move more actively
What is the mixture of fluid and sperm
Semen
How is the ejaculatoryduct formed
When the ducts from the seminal vesicles and the vas deferens unite. When the muscle of the ejaculatory ducts contract its content is expelled through the urethra, to the outside.
What does the urethra do
Transports semen and urine. Transfer sperm through vagina
What is the prostrate gland
A conical shaped gland whitch lies against the bladder. It secretes a milky liquid and gives seman its Oder. This liquid is alkaline and keeps sperm alive in vagina,
In a women at puberty what does the brain do
Tells the ovaries to produce oestrogen whitch tells the eggs to mature. And then once a month an egg leaves an ovary and pops into a Fallopian tube. Where it waits before travelling to the uterus. In the uterus the egg and lining dissolve and leave.
Explain ovulation
In notes
What two hormones do the peturitory gland produce and what do they do
Follicle stimulating hormone - instructs ovary to make mature egg Leuatnaising hormone - goes to ovary and oestrogen is realesed,
What happens after ovulation process
Each egg waits in the Fallopian tube to be fertilized by sperm Sperm leaves the penis, swims up the vagina through the uterus into the Fallopian tube where an egg may be waiting to unite with a sperm. If one sperm enters the egg, (head of sperm penetrate the ovum )they become one cell and pregnancy can begin fertilized by one soerm only the others die
What happens as the baby develops
Grows bigger, the uterus stretches to accommodate. Foetus develops within amniotic sac (surrounded by amniotic fluid that protects and nourishes baby) Ambilical chord connects baby to mom
What is the definition of fertilization
The fusion of the nucleus of the sperm with the nucleus of the egg
What is the product of fusion so sex cells
A zygote
After the zygote is made ( fusion of cells) what happens
It moves along the Fallopian tube to the uterus. As it moves it divides by mitosis. ( cell division) until it’s a round mass of cells. It reaches the uterus after about 4 days , by then it’s a hollow ball of several thousand cells, the blastula
What is the blastula
Hollow ball of several thousand cells