Flatworms. wasu wakilan

An sani game da goma sha biyu da rabi dubu jinsunan flatworms. Dukan su kasu kashi uku azuzuwan. A farko aji hada turbellarians (ciliary), na biyu - flukes, da uku - tef flatworms.

suka zo game da lokacin da Proterozoic. Ya na farko uku-Layer dabbobi tare da hadin fasali. Kamar yadda mai mulkin, flatworms da yara ciyar a kan protozoa. Live dabbobi a cikin ruwa.

Flat parasitic tsutsotsi su fito kadan daga baya. Suna halin canje-canje a cikin mutum narkewa kamar gabobin, da hankula. Zauna wadannan flatworms a cikin jikin dabbobi, da mutane, ko a jiki na kifi. Sun sa guba, mai tsanani da rashin lafiya, ci, kazalika da tsanani lalacewar da jini tsarin. Medical darajar flatworms aka farko tsara ta Scriabin. Academician ɓullo da wani dukan kimiyya - Helminthology. The bayãnin hukuncin alama ne gaban parasitic jinsunan daban-daban kayan aikin (idioadaptatsy). Saboda haka, wadannan dabbobi an same suckers hooks. Suna halin a manyan da kuma haihuwa.

Ciliated flatworms

Wannan aji kunshi game da dubu uku jinsunan. Suna zaune yafi a sabo da marine ruwaye. Lokaci-lokaci za su iya a samu a cikin ƙasa.

Daya daga cikin wakilan turbellarians ne kiwo (fari) planar. Ta zaune a sabo ruwa. Its jiki yana da wani ganye-dimbin yawa, mai nuna raya karshen da kuma mika gaba. Tsawon planarians domin na daya zuwa biyu santimita.

Sake bugun, irin wannan ne da za'ayi biyu asexual da kuma jima'i hanya. A cikin farko idan gicciye rabuwa da jikin kashi biyu.

Hermaphroditic haihuwa tsarin da kuma shirya quite wuya. Cross hadi.

flukes

Wannan ajin da aka wakilta parasitic flatworms siffofin. Suna zaune a adam da vertebrate gabobin, kuma suna samu a kwaro. Akwai game da dubu huɗu jinsunan wadannan tsutsotsi.

Daya wakilin - hanta fluke. Girman ta takardar-kamar jiki game da uku - biyar santimita. A manya rayuwa a cikin bile ducts na hanta, gall mafitsara a cikin mutane da kuma herbivores. A cikin ventral gefe da kuma gaban jikinsa ne na ciki da kuma na baka sucker. Da taimakon wadannan na'urori flukes iya ci gaba a cikin rundunar jiki. Ya kamata a lura cewa wadannan halittu wajen talauci ɓullo da ma'ana gabobin. Just iyo a cikin ruwa, da larvae da idanu.

Flukes ne sosai salon jinsunan. Daga mutum daya a cikin mako guda zai iya haura zuwa miliyan qwai. Su kara ci gaba da ne da za'ayi kawai a cikin ruwa. Tafki kafa daga qwai a cikin larvae, wanda ya isa ya fada cikin tsaka mai gida.

Asexual division larvae auku a jikin mollusk (matsakaici rundunar). A sakamakon wannan kiwo samar da tsaran larvae, wanda tsarin kama da tsarin manya. Bayan da cewa sun fita daga cikin jiki kilam da kuma shirya a kan gabar teku algae. Kafa cysts. A cikin wadannan larvae iya tsira wani lokaci. Tare da abinci ko ruwa iya shiga parasites a wani mutum ko dabba jiki.

Hanta flukes - dauke da lalurar mata. Jima'i haifuwa ne da za'ayi a karshe rundunar jiki.

tapeworms

Wannan ajin yana da mutum dubu uku da jinsunan parasitic siffofin. Zauna kusan duk kawai a cikin hanjinsu mutane da kuma daban-daban vertabrate.

Tapeworms da ribbonlike jiki kunshi wani wuyansa (da rabo a cikin abin da m toho segments), da kuma shugaban segments, kowanne daga wanda aka maimaita hermaphrodite haifuwa tsarin. Balagagge segments aka shirya a raya yankin na jiki da kuma cika da hadu qwai.

Tapeworms iya samun tsawon daga game da 0.5 millimeters to goma mita.

Member na aji ne Bovine tapeworm. Its girma zo daga cervix. A adult Bovine tapeworm parasitic a cikin kananan hanji a cikin mutane da attaching da ganuwar jikin hudu suckers.