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23 Cards in this Set
- Front
- Back
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tunica albuginea |
dense connective tissue capsule surrounding the testes |
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mediastinum testes |
thickening of the tunica albuginea on the posterior side of the testes |
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tunica vaginalis |
a serous sac containing the testes; derived from the peritoneum; contains a visceral and parietal layer |
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pampiniform venous plexus |
network of venules containing cooler blood from the testes that surrounds each testicular artery; helps draw heat from arterial blood |
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dartos muscle |
muscle that moves the testes away from the body |
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cremaster muscle |
muscle that moves the testes towards the body |
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interstitial/Leydig cells |
large cells of the testis that produce testosterone |
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testosterone |
steroid hormone which promotes the development of secondary male sex characteristics |
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LH/ICSH |
hormone which stimulates secretion of testosterone |
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seminiferous tubules |
tubules in the testes in which sperm production occurs |
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straight tubule |
tubule linking the seminiferous tubule to the rete testis in the mediastinum testis |
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rete testis |
a labyrinth of epithelium-lined channels embedded in the mediastinum testis |
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efferent ductiles |
tubules that link the rete testis to the epididymis |
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spermatogenic epithelium |
complex, specialized stratified squamous epithelium that lines each seminiferous tubule |
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myoid cells |
flattened, smooth muscle-like cells present in the basement membrane of spermatogenic epithelium that allow weak contractions of the tubule |
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Sertoli cells |
large, nondividing cells of the spermatogenic epithelium which physically and metabolically support developing sperm cell precursors |
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spermatogonia |
sperm progenitor cells which occupy the basal niche of the epithelial wall of seminiferous tubules |
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type A spermatogonia |
spermatogonia with dark, ovoid nuclei that act as stem cells; divide infrequently; connective as a syncitium |
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type B spermatogonia |
spermatogonia which are spherical and have pale nuclei; undergo a final mitotic division to produce two primary spermatocytes |
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primary spermatocytes |
spermatocytes which undergo the first meiotic division to become secondary spermatocytes |
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spermatids |
haploid cells arising from the second meiotic division of secondary spermatocytes |
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intercellular bridges |
cytoplasm that links spermatogonia into a syncytium; allows haploid cells to be supplied with products of the complete diploid genome |
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spermiogenesis |
the temperature-sensitive process by which spermatids differentiate into spermatozoa; involves formation of acrosome and development of flagellum |
