male reproductive system
diagram of male reproductive system
Structure
testis - produces male gametes inside seminiferous tubules
-secretes testosterone
epididymis - collects sperm from seminiferous tubules reabsorb fluid to concentrate them
- store sperm and is site if maturation of sperm
vas defernes - muscular tube that moves sperm by peristalsis during intercourse
cowper's gland - secretes fluid that lubricate, clean and neutralizes urethra before and during ejaculation
prostate gland - contributes to semen by secreting mucus and chemicals that activate sperm
seminal vesicle - secretes seminal fluid as part of semen
- seminal fluid is alkaline to neutralize contents of vagina to protect sperm
urethra - contractile tube that moves semen through the penis
(glans) penis - fills with blood to become erect
- sensory receptors at tip for arousal during intercourse
Functions of male reproductive system
- produce very large numbers of male gametes which are known as spermatozoa
- produce a liquid medium (semen) for the delivery of sperm into the vagina
- secrete male hormone testosterone
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Female reproductive system
Structure
diagram of female reproductive system
ovaries - secretes oestrogen and progesterone
oviduct (fallopian tube) - muscular tube lined with cilia
- site of fertilization
- transport embryo to uterus
uterus - inner lining endometrium - site of development of embryo/fetus
- outer lining myometrium - contracts during child birth
cervix - neck of uterus - muscle relaxes during child birth
- plug of antibacterial mucus during pregnancy which reduces infection
Vagina - birth canal - site of deposition of semen during intercourse
- bacteria produce lactic acid to prevent growth of microorganisms
Functions of female reproductive system
- produce female gametes in ovaries
- transfer female gametes from ovaries to the site of fertilization in the oviduct
- provide a site for internal development of the embryo and foetus for nine months (gestation period) between fertilization and birth
- secrete female hormones oestrogen and progesterone
