Nemerteans (tsutsa): Description

Nemerteans - tsutsa irin tef-kamar. Da yake a cikin wannan category ba su da waje gabobin da touch. Duk da haka, shi ne iya samar da abinci m asali hanya - "vystrelivaya" a wani yawa na gamsai samar, wanda allocates dogon proboscis cewa ke zurfi a cikin jiki abu.

Abin da hanyar rayuwa suna wakilta dabbobi? Ta yaya nemerteans (tsutsa)? Hotuna da kwatancin wadannan dabbobi masu rarrafe zai la'akari da daga baya a cikin wannan labarin.

Tarihi na samu nemerteans

Domin da farko lokacin da wanzuwar nemerteans koya godiya ga binciken masanin kimiyya G. Barleyz. A 1758, masu bincike samu tsutsa-type wakilci a marine ruwa, ya bayyana ta morphological tsarin da kuma ko da Ya halitta hoto na dabba ne.

Abu mai muhimmanci kumbura encyclopedic sanin nemerteans a cikin XIX karni. Mutane da yawa Dabbobi sun kawo a cikin sabon kimiyya, ban sha'awa facts game da wadannan na musamman dabbobi masu rai da farko a kan teku bene. Quite bayyane gabatar a filin an sanya yiwu godiya zuwa fitowan da nufin yin aiki a zurfin. da definition "nemertean" da aka samarwa a wannan lokaci da kanta.

Nazarin nemerteans tsunduma Soviet dabbobi NA Livanov. A shekarar 1955, ya tabbatar da cewa wadannan dabbobi ne a mika mulki reshe tsakanin lebur da kintinkiri-kamar tsutsotsi. Kafin wannan, wadannan halittu ranked matsayin da irin annelid tsutsotsi - annelids.

bayyanar

A hankula wakilin nemerteans yana da jiki elongated a anteroposterior shugabanci, da ɗan mĩƙe dorsal da ventral sassan. Jikin tsawon na mutum wakilan dabam daga 'yan millimeters to dubun mita. Duk da haka, da ji na da ainihin darajar nemerteans wuya da cewa wadannan halittu suke iya budewa kamar leeches.

Nemerteans - tsutsa wanda jiki ne zuwa kashi truncal da kuma shugaban ofishin. A iyaka tsakanin wadannan rabo daga cikin mahaifa tsagi. The shugaban rabo qunshi bakin dabba. Akwati yankin yana da wani pronounced waje jikinsu. Bangarorin na jiki suna kasaftawa kawai kananan gonads. A raya ɓangare na tsutsa ne da rarrabe dubura.

Skin nemerteans ne iya samar da manyan yawa na gamsai. Saboda haka, mafi yawan tsutsotsi na da irin wannan duba mai sha'awar zuwa da yara. Wurare da dama a teku tsuntsaye da wani haske launi, wanda shi ne wani gargadi na hadari siginar zuwa m makiya a cikin halitta mazauninsu. A daidai wannan lokaci akwai isasshen wakilan nemerteans whitish sautunan. Wasu daga cikin su sun translucent fata, ta hanyar abin da na translucent ciki gabobin.

abinci

Nemerteans - tsutsa, wanda yana da wani elongated baki bude na tubular irin. Ciki shi ƙunshi musamman mouthparts proboscis, wanda birgima zurfi a cikin jiki rami da aka located a kan kayan ciki, a lokacin da dabba da aka Allaha. A lokacin farauta, wannan roba tube tsutsa jũya, kuma aka jefa a cikin shugabanci na azabtar ƙarƙashin rinjayar na'ura mai aiki da karfin ruwa matsa lamba. Mining an rufe tare da m, lokacin farin ciki da acrid gamsai.

Yana ciyarwa nemerteans? A tsutsa iya hadiye ganima dukan immobility ko raba shi a cikin sassa. Wasu dabbobi wakilta irin envelop da ganima, a wani rafta na gamsai, ya bar ta prozapas.

ciki tsarin

Nemerteans - tsutsa, wanda ba shi da jiki rami kanta. Duk da gibba tsakanin ciki gabobin suna cike da connective nama - parenchyma. Cikunna gabatar bãyansu, tsakiya da kuma gaban hanji.

Nemertean da mafi cigaban jijiyoyi cikin kintinkiri-dimbin yawa tsutsotsi. Amma miciwa, waɗannan dabbobi ba. Oxygen jikewa na sel na faruwa ta wajen ta samu ta hanyar fata.

A juyayi tsarin da aka gina a kan manufa na ortogona. A wasu kalmomi - jijiya Kwayoyin samar da takamaiman zaruruwa, da waɗanda aka tattara a cikin jijiya kututturan.

azuzuwan

Bambanta da wadannan azuzuwan nemerteans:

1. Anopla - abin da ake kira m tsutsotsi. A rarrabe da wannan aji na mutane ne da babu proboscis a cikin baka rami. Abinci da aka kama ta hanyar bude, cewa shi ne, a yankin na kogon ciki. Bright wakilin wannan aji abubuwa giant teku nemerteans kira Lineus Longissimus, wanda jiki na iya zama har zuwa mita 30 da nisa daga ba fiye da daya santimita.
2. Nemerteans tsutsa, Enopla aji na da proboscis a gaban na jiki. Last jefa fitar, karin da aka azabtar da mahara stilettos kuma wrapping ta m gamsai. Members na wannan aji suna bambanta mafi yawa suna fadin size.

hanyar rayuwa

Mafi yawa daga cikin tsutsotsi, wanda ake classified a matsayin nemertean ne marine dabbobi da cewa rayuwa a kan kasa. Duk da haka, mun san quite mai yawa jinsunan ruwa tare halittun da irin wannan. Akwai kuma mutum wakilan nemerteans ƙasar.

Nemerteans - tsutsa cewa shi ne predatory salon. Wasu dabbobi kamar gabatar ba farautar nasu, kuma su scavengers. Kuma aka sani da nemerteans, waxanda suke da parasitic a alkyabbar rami na marine mollusks. A halin yanzu, akwai wani cikakken bayanin da oda na 1 da 200 jinsunan tsutsotsi.