anatomy and physiology of the reproductive system Flashcards
what is the function if the human reproductive system?
to produce offspring
what do gonands produce?
gametes
what do ducts do?
transport and store gametes
what do accessory glands do?
support gametes
what is a gonad and its function?
produces gametes( germ cell either male or female , unites with a gamete of opposite sex to produce a fertilized egg cell
what shape are testes and its function?
paired oval-shaped glands produce sperm for fertilizing the female egg
what are the 2 muscles are scrotum has?
Scrotum-suspended outside of the body by this. It has 2 muscles:
1.dartos muscle- smooth muscle -contracts to decrease the surface area in order to decrease heat loss
2.cremaster muscle-skeletal muscle-contracts to elevate the testes during sexual arousal or exposure to cold temperatures
what are ovaries and their function?
paired almond-shaped glands produce egg for fertilization
what is the function of pelvis?
houses the organs of reproduction in the female and fetus has to pass through this during labour
what is the structure of pelvis?
Composed of different bones.
-pelvic bones form an inlet superiorly and an outlet inferiorly.
what 2 structures does the male reproductive system have?
1.external:penis and testes (within the scrotal sac)
2.internal:various ducts and glands. Internal structures pass through the inguinal canal.
what is the female reproductive system?
complex system that produces gametes + prepares body for pregnancy on average 28-day cycle
what is the function of female reproductive system?
ovaries release female gametes while the vagina, uterus, oviducts are accessory organs. These structures receive + transport male gametes and house and nourish and protect developing offspring during pregnancy on average 28-day cycle.
what is the function of specialised gland in male reproductive system?
help clean urethra to prepare for ejaculation through penis.
what are the 3 functions of male reproduction?
1.produce, maintain +transport sperm
2.deposit sperm+ seminal fluid in the female reproductive tract during sexual intercourse
3. produce and secrete the hormone testosterone
what site are the two testes at?
site of spermatogenesis(sperm production)
what is the testicular artery?
originates from abdominal)-blood supply for testes
what is the scrotum?
sac of tissue surrounding two testicles
what is epididymis?
larger tube where sperm cells are stored + undergo final stages of maturation become mobile prior to ejaculation.
what is the structure of epididymis?
continuous tube that coils and winds multiple times within the scrotum.
what are the 4 anatomical regions in the epididymis?
-pseudostratified columnar epithelium: absorbs excess fluid, secretes substances that nourish sperm + perform phagocytosis to remove debris from lumen of epididymis.
-tunica albuginea: dense connective tissue that contains and protects the testicle
-tunica vaginalis-layer of serous membrane -produces fluid to help reduce friction of testicle within scrotal sac.
what is the two ductus( vas deferens)?
allow sperm to be transported from testes to ejaculatory ducts.
function of the vas deferens?
Each ductus passes through prostate gland -additional secretions from seminal vesicles , added to sperm before it leaves body via urethra
what is the lamina propria?
connective tissue helps support epithelium -contains elastic fibres.
what is the sterocilia?
non-motile. Increase surface area help reabsorb large amount of fluid produced to transport young sperm -not yet able to propel themselves.
what are the seminal glands?
tow simple tubular glands-secrete fluid which contribute to semen
what is the bulbourethral(cowpers gland)
2 small exocrine glands -produce pre- ejaculate -helps neutralize acidity of urethra before sperm passed through during ejaculation
what is the prostate gland?
walnut shaped gland-secretes fluid which nourishes + protects sperm
the prostate gland contains leydig cells what is their function?
Leydig cells-produce + release testosterone , male sex hormone
what are the Sertoli cells?
these cells are epithelial supporting cells which line the seminiferous tubules
what is the function of Sertoli cells?
have a supportive and nutritive function-surround and support develop sperm cells provide nutrient to cells and phagocytize debris
what is the structure of Sertoli cells?
connected by each other to tight junctions which create a seal to divide the seminiferous tubule into separate basal and luminal compartments
the Sertoli cells have a seal?
the seal is a blood testicle barrier which stops large molecules from between 2 compartments
what is the structure of testes:seminiferous tubules?
tightly coiled tubes
testes: seminiferous tubules function?
sperm cells undergo mitotic division and differention
how is the ductus deferens formed?
Newly formed sperm move through straight tubules to rete testis which lead to epididymis. As they pass through the tightly coiled epididymis. Tail end of epididymis becomes less convoluted and becomes ductus deferens
penis structure?
cylindrical shaped mass of erectile tissue surrounded by fibrous tissue called tunica albuginea.
what happens in the penis during sexual arousal?
- permeated blood tissue( corpus spongiosum and paired corpus cavernosum) fill with blood from deep artery to produce an erection
what is the penile(spongy) urethra?
serves a passageway for sperm ejaculation + urine excretion
what is the dorsal nerve?
accompanies a neurovascular bundle located superior to corpus spongiosum and corpus cavernosum.
what are the accessory glands:accessory sex glands?
secretes fluid that contribute to volume of semen
what do the seminal vesicles neutralize?
neutralise acid in female reproductive tract
what does the prostate gland do in male reproductive system
nourishes sperm