test 3 Flashcards
(16 cards)
What are the steps of fertilisation;
- Penis is inserted in the Vagina.
- As a result of copulation, semen is then ejaculated within the vagina.
- The semen then travels to the fallopian tubes to fertilise the egg.
- The sperm that reach the egg all have to penetrate the cell wall, in order for a single sperm to fertilise the egg.
- Membrane forms around the egg, preventing the entry of any more sperm.
- Once the egg is fertilised it becomes a zygote.
- The egg then attaches itself to the wall of the womb.
What is the function of the Vas Deferens?
(sperm duct) Carries sperm away from the testes to the urethra.
What is the function of the urethra?
Tube that carries both urine and semen.
What is the function of the testes?
Are the male reproductive organ. (Produce semen)
What is the function of the scrotum?
Skin covered pouch that holds the testes.
What is the function of the epididymis?
Where sperm is stored and matured.
What is the function of the bulbo-urethral glands?
secrete a clear mucus before semen is ejaculated.
What is the function of the prostate gland?
secretes a fluid which is part of the semen.
What is the function of the seminal vesicles?
makes up 60% of semen.
What is interphase?
DNA molecules duplicate.
What is prophase?
Nuclear membrane breaks down.
What is metaphase?
Chromosomes line up on the spindle in the middle of the cell.
What is anaphase?
Centromeres divide.
What is telophase?
Certrioles divide, spindle disappears.
What is cytokinesis?
Becomes 2 daughter cells.
Why are the testes located in the scrotum?
Because the scrotum is on the outside of the body so the temperature is 2 degrees lower then body temp for production and development of the sperm.
