testis
IPA: tˈɛstɪs
noun
- (anatomy) A testicle of a vertebrate.
- (biology) An analogous gland in invertebrates such as the hydra.
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Examples of "testis" in Sentences
- The receptors are everywhere, but the testis is exquisitely sensitive to the drug.
- The testis is a pretty awesome organ, comprised mainly of a bunch of coiled loops called seminiferous tubules.
- -- The male reproductive element of animals is formed by an organ called the testis, or testicle, of which each male possesses two.
- The sperm starts in the male gonad, otherwise known as the testis, and various other things more suited for the locker room than this esteemed blog.
- Spermatozoa travel through the lumen of the seminiferous tubules to the rete testis which is basically a big collecting duct that all the seminiferous tubules empty into.
- From my own observations, I am led to believe that no such muscular structure as a gubernaculum exists, and therefore that the descent of the testis is the effect of another cause.
- Juan Pelota footnote from the W-pedia: "The Latin word 'testis', witness, was used in the firmly established legal principle 'Testis unus, testis nullus' one witness equals no witness..."
- SRY = Sex-determining region Y - aka testis determining factor = TDF - Causes gonad to differentiate into testes SRY protein is DNA-binding regulatory protein Acts as transcription factor Initiates transcription of cascade of genes necessary for testicular differentiation
- The lateral surface, head and tail of the epididymis are free and covered by the serous membrane; the body is also completely invested by it, excepting along its posterior border; while between the body and the testis is a pouch, named the sinus of the epididymis (digital fossa).
- The one above the testis is the plica vascularis, and contains ultimately the internal spermatic vessels; the one below, the plica gubernatrix, contains the lower part of the gubernaculum, which has now grown into a thick cord; it ends below at the abdominal inguinal ring in a tube of peritoneum, the saccus vaginalis, which protrudes itself down the inguinal canal.
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