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28 Cards in this Set
- Front
- Back
in the 5th week, the gonads of both sexes derive from which embryological tissues
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intermediate mesoderm of the posterior abdominal wall
underlying mesenchyme (embryonic connective tissue) primordial germ cells |
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primordial germ cells originate where
and migrate to |
primordial germ cells originate in the wall of the umbilical vesicle
and migrate to the gonadal ridges where they enter the underlying mesenchyme and are incorporated into the gonadal cords |
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the indifferent gonads are comprised of a cortex and a medulla
ovaries are derived from the ___________ testes are derived from the______________ |
ovaries derived from the cortex
testes derived from the medulla the other part, in each case, regresses |
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the testes gradually separate from the disintegrating mesonephros and become suspended by their own mesentery, called
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the mesorchium
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HCG stimulates what in the developing teste
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testosterone production
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Mullerian Inhibiting Substance does what
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produced by Sertoli cells until puberty, MIS inhibits the formation of the paramesonephric ducts that form the uterus and uterine tubes
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when does the lumina of the seminiferous tubules develop
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puberty
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testosterone stimulates the _______________ ducts to form male genital ducts
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mesonephric
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do inguinal canals develop in both sexes
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yes
|
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superior and inferior attachments of the gubernaculum
how many are there? |
sup= inferior pole of the gonad
inf+ the internal surface of the labioscrotal swellings 2, each side of the abdomen |
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what is the processus vaginalis
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an evagination of the peritoneum in the testicular zone, ventral to the gubernaculum
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what herniates through the abdominal wall
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the processus vaginalis
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what fascial layers of the abdominal wall are carried by the processus vaginalis as it herniates through the wall
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External oblique
Internal oblique Transversalis fascia Peritoneum |
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testes descend retroperitoneally at week _____
takes _____ days |
26
2 - 3 |
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extension of transversalis fascia becomes the__________
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internal spermatic fascia
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extension of the internal oblique muscle becomes the ___________
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cremasteric muscle
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extension of the external oblique aponeurosis becomes the ________________
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external spermatic fascia
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once the connecting stalk of the processus vaginalis is obliterated, what do you call that space
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tunica vaginalis
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what happens if the abdominal end of the processus vaginalis remains open and peritoneal fluid accumulates there
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hydrocele of the testis
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besides the gubernaculum, what 3 factors also drive the descent of the testes
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intra-abdominal pressure
differential growth gonadotropic hormones |
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does the testis pass through the processus vaginalis?
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No, posterior to it
the tunica vaginalis forms a 2-layered sac (visceral and parietal layer) which covers the testes |
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what do you call the caudal remnant of the gubernaculum
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epidydimalscrotal ligament
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does the transversus abdominus muscle participate in the tunica vaginalis?
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no
|
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contents of the spermatic cord
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testicular artery and vein
ductus deferens and... The ARTERY of the ductus deferens the cremasteric artery sympathetic nerves genital br. of genitofemoral n. lymphatic vessels pampiniform plexus (a network of many small veins found in the sp. cord) |
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cryptochorism
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undescended testis
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a fold of the intestines in the unfused processus vaginalis
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congenital indirect inguineal hernia
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descent of the ovaries
the gubernaculum attaches where caudally |
caudally to the uterus near the attachment of the uterine tube
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cranial part of the gubernaculum becomes what ligament in the ladies
caudal part? |
ovarian ligament
round ligaments of the uterus, which pass through the inguinal canals to terminate in the labia majora |