Kiel - lokhu ... Kungani kudingeka izinyoni

Ezincelisayo Zasolwandle nezinyoni - kuyinto esivelele ukuvela ezilwaneni ezinomgogodla. Futhi zombili uvele emhlabeni ngesikhathi esifanayo. Ngisho esikhathini Triassic kwakungamadodana ezincelisayo bokuqala, okuyinto abahlukene izibankwakazi. Kwakumelwe zazingavumi kahle futhi bengenalo neze okusikhumbuza izilwane yesimanje. Ekuqaleni kwesikhathi Jurassic kusukela izibankwa eliwumhlaba weza ezindizayo, okuye kwavula ekilasini wezinyoni.

Awezinyoka azinabantu yonke insimu, okuyinto avunyelwe ahlale izinyoni lokuqala nezilwane ezincelisayo ezindaweni khulula. Futhi iqiniso lokuthi benqobe amazwe amasha, ukuthi ongakayisebenzisi isetshenzisiwe izibankwa, nomthelela yokuthi ezincelisayo nezinyoni uvele ezincwadini ukuze ikwazi ukuziphilisa ngesikhathi ezihlukahlukene izimo. Izibankwa - lawa izimbangi main, ngiyabonga kubo izinyoni ngcono isimiso sezinzwa, izinzwa nokuziphatha. Namuhla sinesithakazelo ikakhulukazi isakhiwo ndaba. Sinikeza ngijwayele kule ingxenye yomzimba njengoba keel. Le divayisi, e kwezinyoni nezinye izilwane. Kuyini, ukuthi imisebenzi eyenziwa, esingayifunda kulokhu umsebenzi.

Isakhiwo izinyoni

Izinyoni eziningi ingandiza, abanye ngokuhamba kwemvelo, baye laphela lelo khono. Manje asikhulume okuncane mayelana isakhiwo amaphaphu izidalwa emoyeni. amathambo ijabulise, ayegcwele lime usawoti, ukuvumela nezinyoni ezindiza, ngoba skeleton yabo iba namandla kakhulu futhi ukukhanya. Ugebhezi futhi izici izinyoni: ohlangothini front kuphela enethiwekhi ezinkulu iso kanye umlomo wenyoni, elalikade kwaba emhlathini ngamazinyo.

Intamo obuphelele ezahlukene ehlanganisa nokuya nomaphi, liphethe eziyishumi kuya amabili nanhlanu amathambo. Njengoba imilenze front - kukhona amaphiko, umthwalo anda imilenze: amathambo yakha okhalo ingxenye tho, ngakho baye baba namandla kakhulu. Zikhona izici kule nokwakheka uMnyango ehlombe, isibonelo - the keel. Lena ithambo enamandla kakhulu, esebenza entabeni adingwa yimisipha pectoral. Ake sixoxe ngalokhu kancane.

Kiel

Njengoba sishilo, the keel - lokhu yayifanekisela nomxhantela, okuyilona elidingekayo ukuze umuntu ukulungisa izinyoni kwemisipha pectoral. Lokhu yayifanekisela nomxhantela kwamiswa inqubo yokuziphendukela kwemvelo, njengoba izinyoni ingandiza sibonga kule divayisi, ngoba imisipha pectoral baye basungula ngamagama ashubile. Akayena izinyoni kuphela, kodwa futhi kwezinye izilwane, okuyinto has a imilenze enamandla phambi: njengoba umthetho, bemba bashone phansi. Isibonelo kungaba imvukuzane. Kodwa ikakhulukazi ekuthuthukiseni lesi keel usenayo at flying izinyoni, amalulwane. Kukhona ngisho okuthiwa keel izinyoni: hummingbird, amahlolamvula nokunye. Okungukuthi, kungashiwo ukuthi keel - yithuluzi izinyoni nezilwane burrowing, ngaphandle lapho nje ongakwazi ukuzenza.

imisebenzi

Kiel - lena ngokuyinhloko izinyoni, yayifanekisela nomxhantela bony kabuhlungu emgogodleni thoracic, kuba flat, isetshenziswa ukuxhuma imisipha sasivumela eqinile abathintekayo nge ukunyakaza. Gqamisa injongo eyinhloko futhi umsebenzi wethambo yokhalo.

• Kiel nathi kudingeka uqinise yomgogodla thoracic, ie amathambo endoda le ngxenye kuyinto ngempela isikhathi eside. Singasho ukuthi ithuluzi ezengeziwe ukuvikela izitho ezibalulekile.
• Njengoba izinyoni lapho amaphiko ezihambayo abathintekayo impela eningi imisipha, lo keel igibele enombolweni enkulu kangaka imisipha zesivikelo sesifuba.
• Futhi, lolu yayifanekisela nomxhantela ikhuthaza ukuhamba kwe-thoracic. Lokhu kukuvumela ukwenza ukunyakaza ne ukudonsa umoya.
• Umsebenzi yokugcina - ushintsho endleleni lwendiza, keel akuyona indawo yokugcina kule nqubo.

Kwezinye izinyoni kungekho keel

Ngakho keel - kuyini? Saphendula lo mbuzo. Kuye kuthiwe ukuthi kukhona yayifanekisela nomxhantela izinyoni, kodwa alikhulumi okuhlukile. Kubalulekile ukucacisa ukuthi kukhona subclass ka ratites. Ngaphambili bebizelwa kanje:

• Shifty.
• Intshe.
• Gladkogrudye.

Lokhu subclass zihlanganisa amaningi njengoba 8 amayunithi:

• Casuariiformes.
• Kiviobraznye.
• Nanduobraznye.
• Ratite.
• Tinamuobraznye.
• Epiornisoobraznye.
• Litornitoobraznye.
• Moaobraznye.

Mayelana yokugcina izinkampani ezintathu, abantu abaningi bebengeke bakwazi yizwa, njengoba sekuyisikhathi eside nababamele kwaba yokuqothulwa.