Uhlobo izimpethu flat, ikakhulukazi isakhiwo zangaphakathi nezangaphandle

Uhlobo Flatworms siqukethe izinhlobo ze-non-yisinanakazana kanye yisinanakazana. Kulesi khulula-eziphilayo eziphilayo ehlangana class elilodwa kuphela, kanye nalabo abaphila ngezithukuthuku nezinye izinto eziphilayo, - eziyisithupha. abameleli Class ciliated (Planaria turbellarians) bahlala machibi, ngokuvamile kukhona eziyingozi.

flatworms ezidlayo kalokhu enyameni bezilwane nabantu. idatha ukuze eziphilayo kahle bazivumelanisa mibandela wokuphila, okungukuthi.. abe sucker, okuyinto anamekwe izindonga izibilini ezazibekwe phezu kwempi, umzimba ihlukene nge ezilokhu zanda izingxenye. Basuke izimpawu ukungabi wokugaya ukudla (ngaphandle ekilasini Flukes), izakhi amuncwa wumzimba ngokusebenzisa amaqhubu ekhethekile; kwezimila anaerobic (bona siphefumule endaweni kakhulu umoya-mpilo-free), futhi ayanda (zingabantu hermaphrodites).

Zonke lezi zici ukuvumela lokhu umzimba ukuhlala lapho unomphela emzimbeni umninikhaya sika futhi ngezindleko zakhe. Lezi helminths zihlanganisa: isibindi yisikhohliso, remenets, ikati yisikhohliso, ingulube tapeworm, Echinococcus, njll Ukuze abambe indoda bangakuqinisa, uma udla izinkomo iluhlaza noma kabi iphathwa inyama, ingulube nenhlanzi ..

Uhlobo Flatworms ihlanganisa eziphilayo babe nezici ezifanayo, kokubili isakhiwo zangaphakathi nezangaphandle. Zimelela bespolostnoy izilwane une-side, umzimba isicaba phansi, isb. E. It has a flat noma kakhulu flat. Futhi, isikhathi sabo kuqala kunemugca zamazwe amabili e ontogeny wabeka izingqimba zamagciwane ezintathu - ecto, Meso futhi endoderm - zazo izitho zangaphakathi akhiwa esikhathini esizayo. Uhlobo Flatworms futhi ephawula khona isikhumba-imisipha sikhwama okuyinto kuyinto ephelele yama epithelium bese kulahlwa ngaphansi kwezintambo zesivikelo sesifuba kwemisipha. Lokhu kubenza bakwazi "worm-like" ukuhambisa.

Uhlelo kokudla ngefomu free isakhiwo zazingavumi kahle futhi bengenalo siqukethe foregut, noma pharynx, midgut, okuyinto uphela zifa. Ngo helminths lokhu uhlelo isitho sinciphile.

Ngethukile uhlelo flatworms emelelwa abhanqiwe cerebral ganglia futhi izinzwa iziqu, okuyinto aphambuke kuyo futhi zixhunywe amabhuloho annular. Kakhulu athuthukile ezimbili longitudinal isiqu besisu.

izinhlelo kwegazi futhi zokuphefumula ungekho. Breathe abameleli besigaba epithelium ciliated, olwaluhlanganisa umzimba wabo kusukela ngaphandle.

izitho Excretory - protonephridia. Zakhiwa uhlelo ijabulise, okuyinto ukuqeda amaseli stellate nge cilia. Excretion imikhiqizo umzimba langcolile imvelo kwenzeka ngokusebenzisa Ukuvuleka ezikhethekile excretory.

Ezalayo uhlelo hermaphrodite futhi avame isimiso Amapayipi, okuyizinto ezidingekayo zokuqeda imikhiqizo ngokobulili, futhi copulatory isitho ukuvundisa yangaphakathi.

Ngakho, uhlobo izimpethu flat - yilokhu ngokuyinhloko amafomu yisinanakazana (helminths), abakwazi ukuzivumelanisa futhi uzivumelanise indlela yabo yokuphila.