Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Mhuka zhinji dzine mitsipa dzine pineal gland. Zvinoita sokuti tateguru vemhuka dzose dzine mbabvu vaiva nemitezo miviri inoona chiedza iri pamusoro pemusoro wavo, yakafanana nemitezo iri mumapere emazuva ano. Dzimwe hove dzakapera dzeDevonian dzine foramina mbiri dzeparietal mumapfupa adzo, zvichiratidza kuti maziso eparietal akanga ari emadzitateguru. Ziso reparietal uye pineal gland ye tetrapods mhenyu ingangove iri vazukuru vechikamu chekuruboshwe uye kurudyi chechiremba ichi, zvichiteerana. Munguva yekukura kwemabhonzo, ziso reparietal uye chiremba chepineal chezvisaririra zvemazuva ano uye tuataras zvinoumbwa pamwechete kubva muhomwe yakaumbwa muuropi ectoderm. Kurasikirwa kwemaziso eparietal mune tetrapods akawanda aripo kunotsigirwa nekukura kwekuumbwa kwechimiro chakabatanidzwa icho chinozobatana kuva pineal gland imwe chete mukukura kwemabhonzo emhembwe, nyoka, shiri, uye mhuka. Nhengo dzepineal dzemhuka dzinowira mune chimwe chezvikamu zvitatu zvichibva pachimiro. Makonye ane pineal glands yakaoma kunzwisisa kupfuura dzimwe mhuka dzinoyamwisa. Ngwenya nedzimwe mhuka dzinoyamwisa dzinogara mumatunhu anotonhora (dzimwe dzinonzi xenarthrans (sloths), pangolins, sirenians (manatees & dugongs), uye dzimwe marsupials (sugar gliders) dzakarasikirwa neziso radzo reparietal uye pineal organ. Mhuka dzinoyamwisa dzomunzvimbo dzepolar, dzakadai semahorse nedzimwe mhuka dzomugungwa, dzine pineal glands dzakakura zvisingawanzoitiki. Mhuka dzose dzinorarama mumvura dzine pineal organ, asi dzimwe nhunzvi nemakunguwo zvinewo zvinonzi "frontal organ", izvo chaizvoizvo ziso rinenge rakafanana neromusoro. Pinealocytes dziri mumhuka dzakawanda dzisina mhuka dzine mbabvu dzine mavirovhero dzakafanana zvikuru nemasero anogamuchira chiedza ari muziso. Uchapupu hunobva mukuumbwa kwechimiro uye kukura kwehupenyu hunoratidza kuti masero epineal ane tateguru akafanana mukushanduka-shanduka nemasero eretinal. Pineal cytostructure inoita kunge ine zvakafanana mukushanduka-shanduka nemasero eretinal emeso epadivi. Shiri dzemazuva ano nezvisikwa zvinokambaira zvinobudisa pigment inonzi melanopsin mupineal gland. Mapineal glands eshiri anofungidzirwa kuti anoita se suprachiasmatic nucleus mumhuka dzinoyamwisa. Chimiro chepinial eye mumadzerere azvino uno uye tuatara...  Mubvunzo: Ko nhevedzano dzemazuva ose dzinobva kupi muvanhu nedzimwe mhuka dzinoyamwisa?
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