Repro 4 Flashcards
4 component parts of male reproductive system?
paired testes- site of spermatozoa production, and sex hormone secretion
duct system- transports spermatozoa to urethra
accessory sex glands- supply fluid components to semen: prostate, seminal vesicles, bulbourethral glands
penis
type of gland the testis is?
compound tubular gland
What does the tunica albuginea form posteriorly that contains many interconnected channels which provide passageways for sperm to enter duct system?
mediastinum testis
muscle contained within superficial fascia of the scrotum?
dartos muscle
what are the testes contained within?
the scrotal sac
the 2 types of cells found within the seminiferous epithelium?
sertoli cells (supporting cells) spermatogenic cells (germ cells)
most primitive spermatogenic cells?
spermatogonia-rest on BM
distinguishing between spermatids and spermatozoa on microscopy?
spermatids- lightly stained round nucleus
spermatozoa- deeply staining heads, which appear to be embedded in sertoli cells, their tails hanging into lumen of seminiferous tubule
approximate length of spermatogenesis?
70 days
what is oligozoospermia?
clinical condition where abnormally low number of spermatozoa in semen.
what is azoospermia?
no sperms appear in ejaculate
what is cryptorchid (maldescended) testis, and what problems can it create?
spermatogenesis impaired as elevated temperature. Germs cells absent, while Sertoli and Leydig cells secrete male sex hormones.
Associated with increased incidence of malignant testicular tumours
what is orchitis?
inflammation of testes- occurs in some people who suffer mumps after puberty, causing impaired spermatogenesis, occasionally leading to seminiferous tubule degeneration, or at times, infertility.
what happens to sperm in the epididymis?
transport, mature, stored
stored in tail segment until ejaculation
name of terminal portion of vas deferens?
ampulla
how is the ejaculatory duct formed?
ampulla of vas deferens joins with duct of seminal vesicle
ejaculatory duct then opens into prostatic urethra
epithelial lining of ductus epididymis- duct of the epididymis?
pseudostratified columnar with stereocilia
discontinuous layer of longitudinally-oriented strands of striated muscle enclosing spermatic cord?
cremaster muscle
collection of small veins surrounding vas deferens, and forming most bulk part of spermatic cord?
pampiniform plexus
which bacteria may cause epididymitis?
N gonorroheae, E coli, Chlamydia trachomatis
sequence of secretions that forms ejaculate?
bulbourethral glands
prostate
spermatozoa
seminal vesicles
where do the seminal vesicles lie?
posterior to prostate
where are the bulbourethral glands located?
within the urogenital diaphragm
3 cylindrical bodies of erectile tissue forming the penis?
2 corpora cavernosa penis
single corpus cavernosum urethrae (corpus spongiosum)