Polyp hydra - isingawanzowanikwi makaro

Hydra - ndiyo mhuri chaiyo, nhengo yekirasi kuti hydroids mhando coelenterates. Vanorarama chete Freshwater, kunyanya akasungirirwa chete duckweed. Vanosarudza kugara chakajeka nzvimbo madziva uye marshes, sezvo kufanana chezuva. Vakaguta mvura inda, duku mosquito mazana, furaya, cyclops, vodoemnym plankton.

Polyp Hydra zvakafanana pakukura kuti tsanga yebhari. Iye translucent, grayish Hue. Kune rumwe rutivi ine gomba, iyo anoita sezvo mhango uye chinangwa kusvina tsvina vakakomba tentacles. Asiwo munhu anonzi sole nawo rwakanamatira mira mvura pamusoro.

The muviri ine mbiri sero mhando - kwokunze uye dzakawanda. Ose mukati - zviri chete intestinal mhango. Afemeruke rinoitwa panyika muviri pamusoro.

Nokugamuchira hwega chinzvimbo, Freshwater hydra yaita chando ari kutarisira rechipfuwo. On the tentacles ndivo cilia tuduku kuti anobatsira kuziva kuuya zvakatapwa. On hydra muviri pemvura kuti mukuru zvakadini pamusoro tentacles, pane masero ane bvudzi projecting chine Kamudzira muchetura. NeVadzidzi kugadzirwa muchitokisi yakadaro, uchibata uturu inouraya naye. Hydra tentacles anomhanyira namarudzi muromo uye rinozvipedza.

Polyp hydra - anokara chaiyo. Iye anogona kudya uwandu zvokudya katatu kupfuura vayo. Ikavamedza zvokudya anoenda zvakananga munzvimbo intestinal lumen, ndiko ozeyewa nokukurumidza.

Kana mugodhi maviri hydra, vanotanga muchayamwa chibayiro kumativi ose. yakasimba kana iriyo yakakura, kumedza duku. Asi gangaidzo, ikamedza hydra haazofi. Kwapera nguva nayo rinoputika kubva ushingi kumedza. Zvaakanga ava intestinal lumen yomumba, "otryahnuvshis", iye anowana hwomutambarakede nzvimbo, netsvimbo yaita chando ari kutarisira zvokudya.

Hydra Freshwater anogona muwande nzira mbiri: yotunga (asexual) uye kugovera (kurara). In nzira yokutanga unobereka imwe kana kupfuura growths pamuviri wayo, iyo, kana yakura, vanoparadzaniswa ne "mai." Nokuti mwedzi hydra anokwanisa kusika kusvika 15 marudzi ravo mhando. Nzira iyi nyore rakanyatsojeka zvibereko nekuti vana vakawanda vakawana kudaro, chinopukunyuka.

Musimboti yechipiri anoshandisa kupararira pakuparwa pokushomeka kwezvokudya. In zvokudya zvinovaka muviri ezvinhu ndiwo paumbwe kuti utachiona masero. Uye pane dzimwe specimens masero varume vari kuumbwa, uye pane dzimwe - vakadzi. Mushure fertilization, zai aumbwa, apo mukuru mumwe anofa, uye kunoguma zai rinosakara kusvika pasi. Pashure avete imwe nguva, nokuti unogona aumbwa yechirimo hydra, asi kakawanda unofa.

Freshwater polyp Hydra dzakawanda hwavo vachiri. Kana zvakafanira, anogona kufamba, kutama uye vaikunga muviri sole. Kuwana musha mutsva, izvozvo vakanwa.

Polyp hydra ane mukuru anokwanisa wokugadzirisa vakarasika kana kukuvaradzwa dzomuviri (regenerated). Kana kutsemuka mumwe munhu muzvikamu zviviri, kunyange dzisakarurama, anova hydra maviri. Masayendisiti vakaratidza kuti hydra hunonzi usingafi.