Histology of male reproduction Flashcards
what is shown in the image
sub fertility
what is shown in the image
prostatic enlargement
clinical relevance of the histology of the male reproductive system
sub fertility
prostatic enlargement
male factor infertility pre-testicular
HPT axis failure
lifestyle and genetics
testicular male factor infertility
post testicular male factor infertility
where does the production and maturation of sperm occur
testis and epididymis
testis function
spermatocytogenesis
spermiogenesis
epididymis function
mature and motile
which glands produce seminal fluid
seminal vesicles
prostate gland
bulbourethral glands
which 3 components are involved in the transport of sperm and receiving seminal fluid
ductus deferens
ejaculatory duct
penis
ductus deferens transporting and receiving
from epididymis to ejaculatory duct
receives fluid from the seminal vesicles
ejaculatory duct transporting and receiving
within the prostate
connects ductus deferent to urethra
penis transporting and receiving
contains urethra deposits sperm into female reproductive tract
label the image of the testes
what is in the image and label
seminiferous tubules
highly coiled
several cross sections
central lumen
well defined basement membrane and myofibrils for transport
contains germinal epithelium (sperm cells)
contains Sertoli cells
where are Sertoli cells located
in the seminiferous tubules
interstitium
outside of the seminiferous tubules
contains Leydig cells
fibroblasts
collagen
capillaries
lymph vessels
where are Leydig cells found
in the interstitium
cells of the testes
leydig
sertoli
sperm cells at various stages of development
basal lamina
capillaries
blood-testes barrier
label the image
which cells are hormone producing in the testes
leydig cells
Sertoli cells
leydig cells
interstitium
synthesise testosterone
respond to leutenising hormone
Sertoli cells
located in the seminiferous tubules
synthesis of hormones and proteins
respond to follicle stimulating hormone
support cells for spermatogenesis
what is in the image and how can these be located
leydig cells
find the basal lamina and look for cell in interstitium
round cell, round nucleus, Reinke’s crystalloid
what is in the image and how can these be located
Sertoli cells
find the basal lamina
look for cell in the seminiferous tubule
appears distinct in H&E
tall columnar cells, cytoplasmic extensions and tight junctions
function of Sertoli cells
guide sperm towards lumen (forms and re-forms junctions)
blood testes barrier (tight junctions, immunologically safe)
secretes fluid (move immobile sperm to epididymis)
transfer of nutrients
phagocytosis (residual cytoplasm and dead sperm)
produces (ABP, inhibin, AMH and oestrogens)
androgen binding protein
androgen binding protein binds to testosterone
decreased lipophilic property
high levels of testosterone is pre-requisite for spermatogenesis
concentration of testosterone in seminiferous tubules»_space;> systemic circulation
what are the components of spermatogenesis
spermatocytogenesis
spermiogenesis
definition of spermatocytogenesis
spermatogonia undergo meiosis 1 and 2 to produce 4 haploid spermatids
spermiogenesis definition
each spermatid becomes a highly differentiate spermatozoa
primary spermatogonium
mitosis
renew stem cell population
prior to meiosis commencing