1.1 Flashcards
The testes are in a sac called the
Scrotum
Male gametes or sperm are produced in the
Testes
The scrotum keeps the testes at about
35 degrees
The testes are kept 2 degrees lower than normal body temperature as it is the
Optimum temperature for sperm development
The testis is divided internally into several lobules. Each lobule contains many long tubules called…
seminiferous tubules
Sperm are produced in the
Seminiferous tubules
Between the seminiferous tubules are
Interstitial cells
Interstitial cells secrete…
Testosterone
The seminiferous tubule join together to form larger tubes called the
Vasa efferentia
The vasa efferentia join together to form a long coiled tube calls the
Epididymis
The sperm are stored in the
Epididymis
The epididymis leads into another tube called the
Vas deferens
The vas deferens carries the sperm towards the
Urethra
As sperm pass along the vasa deferentia, secretions are added from the
Seminal vesicles
The seminal vesicles produce mucus which makes the sperm more
Motile
The prostate gland produces an alkaline fluid that also helps sperm motility as well as
Neutralising any acid urine that remains in the urethra
The mixture of sperm and secretions is called
Semen
The female gametes (ova) are produced in the
Ovaries
A woman releases one ovum approximately every month from the age of puberty until
Menopause
the ovum is fertilised by a sperm in the oviduct which is lined with
Mucus-secreting ciliated epithelial cells
Fertilised ovum is a
Zygote
As the zygote travels down the oviduct, it divides to form a hollow ball of cells called the
Blastocyst
The blastocyst reaches the uterus after about a week. Here it implants into the lining of the uterus called the
Endometrium
Some of the cells in the blastocyst form the embryo and the rest form the
Placenta
The embryo develops into a foetus within the
Uterus
