The Human Reproductive System Imkita

Front 1

Male reproductive system

Back 1

· a pair of testes found in the scrotum

· epididymis

· vas deferens

· ejaculatory duct

· urethra

· seminal vesicles

· prostate gland

· Cowper's glands

· the penis

Front 2

Testes

Back 2

· the male sex organs

· they occur in the scrotum which lies outside the abdominal cavity

Front 3

Structure of the testes

Back 3

· seminiferous tubules found in each testis

· seminiferous tubules are lined by germinal epithelial cells that produce sperm

· inside the seminiferous tubules are the cells of Sertoli which are rich in glycogen

· glycogen serves as nutrients for the spermatids as tgey develope into sperm

· the interstitial cells (called cells of Leydig) are found between the seminiferous tubules

· the cells of Leydig excrete testosterone

· testosterone is responsible for the male characteristics

Front 4

Spermatogenesis

Back 4

The process by which sperm is produced

Front 5

Tubules responsible for carrying sperm

Back 5

· epididymis

· vas deferens

· ejaculatory ducts

· urethra

· Accessory Glands

Front 6

Epididymis

Back 6

A coiled tube lying outside each testis but within the scrotum. It leads from the seminiferous tubules, stores sperm temporarily and later passes the sperm into the vas deferens

Front 7

Vas deferens

Back 7

Carries the sperm from the epididymis into the ejaculatory duct

Front 8

Ejaculatory ducts

Back 8

Joins the urethra just after it leaves the bladder. Contraction of the muscular walls of this duct forces semen through the urethra

Front 9

Urethra

Back 9

A tube that runs through the penis and opens at the tip of it. It is a common tube for passage of urine and semen

Front 10

Accessory Glands

Back 10

(Seminal vesicles, the prostate gland and the Cowper's glands) secrete a fluid which promotes the movement of the sperm and that also provides nutrients

Front 11

Penis

Back 11

The external reproductive organ of the male. It is responsible for transferring the sperm to the female. It is made up of spongy tissue which becomes filled with blood, causing the penos to become erect before it is inserted into the female organ

Front 12

The structure of the female reproductive system

Back 12

· two ovaries

· a fallopian tube leading from each ovary

· uterus/womb

· vagina/birth canal

· vulva/external opening

Front 13

The ovaries

Back 13

The female sex organs. They occur in the lower part of the abdominal cavity and are held in place by ligaments. Each ovary is made of a covering of germinal epithelium cells with a large number of follicles within it

Front 14

Structure of the ovaries

Back 14

· the germinal epithelium that produces the follicles

· oogenesis takes place within the follicles to produce the ova

· the follicles excrete oestrogen and progesterone

· when poverty occurs, these hormones becone responsible for the female characteristics

Front 15

Fallopian tubes

Back 15

· convey ova from the ovaries to the uterus

· the upper part of the fallopian tubes are expanded into ciliated funnels which partially enclose the ovaries

· two fallopian tubes open into the uterus

· the endometrium (the lining of the uterus) is richly supplied with blood vessels

· the cervix extends to the vagina

Front 16

Vagina

Back 16

Leads from the uterus to the outside by means of the vulva. During copulation, the penis is placed into the vagina which then releases sperm

Front 17

Changes in puberty

Back 17