Dwelisa iimpawu yamandulo iintlanzi mihla cartilaginous. iimpawu zazo

Kweli nqaku kuyimfuneko dwelisa iimpawu yamandulo intlanzi mihla cartilaginous. Ezi ziquka stingrays nookrebe. Oku ngazo kwaye ziza kuxoxwa.

Ookrebe ray: isishwankathelo jikelele

Njengoko sibonile ngaphambili, le udidi yentlanzi, iqela, abameli cranial ebalaseleyo kuzo kwimitha kunye ookrebe. Iintlobo zokuhlola aliqela eli eklasini iintsalela kwamaqela yamandulo. Njengoko ngaphambili kulindelekile ngenxa yokungabikho amathambo akumenzi iqela lezilwanyana kokubhalwa kwembali. Kodwa eziliqela iimpawu ezinjalo ikhonkco ikhona.

Uluhlu kweempawu yamandulo

Okokuqala, banalo enjalo njengoko kungekho lwesinye qubha. Okwesibini, abanalo kumculo lugubungela ngokwazo iigilizi kuba nesakhiwo kwakudala. Zonke slits kumculo, yena, ivula phandle kukho umnyango elizimeleyo. Zonke ezi mpawu kuyichaza eziziimpawu nentlanzi yamandulo. Kulo mba, kufuneka sibe sihamba rhoqo. Inkqubo yegazi kukuba ukusebenza ngempumelelo ngakumbi, intliziyo igazi imilo cone eza kuphucula ukusebenza ejikeleza. Kodwa ke inkalo ukrebe liqumrhu enamandla izihlunu, enceda yokumpompa igazi emzimbeni, njengoko intliziyo ookrebe azinikezelwanga apha naphaya layisha phezulu.

Kuyimfuneko ukuqhubeka ukudlulisela iimpawu bamandulo ngakumbi oloNgezelelweyo intlanzi mihla cartilaginous. Okwesithathu, na isakhiwo yokwakheka umzimba kwehlisa iimpikiswano zochuku emanzini, ngaloo ndlela kusandiswa Isantya intshukumo. Ukongeza, ukukhutshwa ngasese ithintela kuthinjwe sisidleleli umzimba wentlanzi kwaye kwisithuba likhusela kubo kwiintlobo ezithile iintsholongwane.

Okwesine, cartilaginous umlomo intlanzi lokuvula sizilungise transversely, oko luphawu ngenxa iintlanzi mandulo, phambi apho Sisiseko ekhaleni (rostrum), intlala ibunjiwe, isakhiwo ekuso, umzekelo, ookrebe. Okwesihlanu, umzimba igutyungelwe esikhatshwa placoid.

LeSithandathu, ningaphambuki ngokupheleleyo ukudwelisa imiqondiso yamandulo neentlanzi cartilaginous mihla ngokupheleleyo, ukuba athathele ingqalelo peculiarity yokuzala yabo. Ngenxa oku ziqhelana ngakumbi kwiimeko zentlalo kunokuba, yithini, intlanzi ingamathambo, eziqhuma akukho umdlalo ezikhuselweyo ukuze bazibonele ngokwabo. Inxalenye ebalulekileyo ye-caviar kuhlala unfertilized. Uninzi sharks kunye imitha umzimba umbungu ezinxulumene nonina emva "Beka yaBantwana" ezithile, ezifana ezanyisayo placental. Okanye walala ukunxiba amaqanda ezinkulu elingqingqwa iqokobhe, azithi nkxu esantini.

Isakhiwo lwangaphakathi iintlanzi eklasini

Makhe sithethe isakhiwo lwangaphakathi intlanzi, leyo kunganxulunyaniswa udidi intlala, abantu abaxhaphaza abantwana kunye nabameli ngokudangazela kule klasi, ngathi ukrebe.

inkqubo Muscle kookrebe siquka myomer, kuphuhliswa. Myomere - izahluko kwezihlunu. Izihlunu baphiwa ligazi, njengoko intshukumo shark - ukuba ubomi. Ukuze kookrebe igazi umva intliziyo, kuphela ingcinezelo eyenziwe entliziyweni, akayi kuba ngokwaneleyo. Ukungabikho womchamo nezintso luphawu isakhiwo lwangaphakathi kwezi abameli (ingakumbi polar sharks). Le nobumdaka yakuhlamba igazi idubule ngesikhumba nje irhamncwa ngaphandle. Gill slits ebekwe phezu komhlaba umzimba kunye nokuvulwa ngaphandle ukuya emqaleni. Njengokuba kuchazwe ngasentla: ukrebe akakho isinye qubha, oku ngokukodwa kuyinyaniso ukuba iimpawu yamandulo ookrebe ezidweliswe ngasentla mihla ray. Ukongeza umsebenzi wayo ophambili, isibindi lisebenza yinxalenye lwesinye qubha. zobukhulu isibindi ebalulekileyo. Kwakhona, lo msebenzi ngokomkhethe wathabatha phezu injeke kunye senyongo.

isiphelo

Ngenxa yoko, siye wachaza yaye adweliswe imiqondiso yamandulo iintlanzi mihla cartilaginous ziyagxininiswa iimpawu ngesakhiwo ukuqhelaniswa abahlala kwindawo efana nentlanzi yamandulo.