Polychaete ikpuru: a nkenke nkọwa nke klas

Polychaete ikpuru na-ugbu a na-ewere ndị kasị otu nke mmiri ntule. The kasị nnọchiteanya nke klas ndụ na ike nke oké osimiri ahu nke mmiri, na ọtụtụ ihe na-erughị yiri ka iduga a planktonic ụzọ ndụ.

Polychaete ikpuru: ahụ ụlọ

Nnochite anya nke a na klas ahụ mejupụtara isi nke ngalaba, ogologo ahu na kpọmkwem gbasara ike n'ọnụ ọnụ. N'ọnọdụ ka ukwuu, ahụ nke anụmanụ na-doro anya na-ekewa n'ime ọtụtụ agba, ọ bụla nke na-mmasị parapodium.

Parapodia na-anọchi anya ihe ọ bụla ọzọ karịa ndị oge ochie na nsọtụ na a obere afụ ọnụ na bristles. Ọ bụ na-akpali ụfọdụ ndị so nke ìgwè parapodium ghọọ gills.

Dị ka ndị ọzọ so ụdị annedil (leeches Oligochaeta) si anụmanụ dị otú ahụ n'ahụ bụ nke anụ-muscular nwa. N'elu irighiri ahụ kpuchie a mkpa na-echebe cuticle, bụ nke dị n'okpuru otu-oyi akwa epithelium. N'okpuru ebe a na akpụkpọ bụ uru, nke ndị mejupụtara longitudinal na okirikiri uru na-ahụ maka ije ma belata anụmanụ ahụ.

Polychaete ikpuru: esịtidem Ọdịdị

Anọchitekwa anya nke a na klas nwere a pụtara na-mepụtara digestive usoro, nke ndị mejupụtara atọ n'akụkụ. The n'ihu akụkụ mejupụtara ọnụ na-emepe n'ime onu oghere. Mgbe ahụ a mpempe nri adaghị muscular pharynx. Site n'ụzọ, na pharynx nwere ike jaws nke chitin. Ụfọdụ ụdị ọbụna ike ighikota ya.

Mgbe egwe oriri n'ime nkọlọ, nke ga-emepe isi glands na-emepụta asu. Nanị ole na ole na-anọchite anya nwere a obere afo. The midgut nke anụmanụ na-eji mezue gbarie na absorption nke mkpa nri. The n'azụ ngalaba nke eriri afọ bụ nke e guzobere na nsị na ike ga-emepe na dorsal akụkụ nke gbasara ike n'ọnụ ọnụ.

Polychaete ikpuru nwere a mechiri emechi usoro ọbara ji erugharị, nke bụ ihe dorsal na ventral akwara. Site n'ụzọ, na dorsal arịa bụ nnukwu na nwere contractile ọrụ, n'ihi ya, ọ na-arụ ọrụ dị ka a obi. Ọzọkwa, nnukwu akwara ejikọrọ na-akpọ annular arịa na-ebu ọbara ka na nsọtụ na gills.

Akụkụ okuku ume na usoro na ndị nnọchiteanya nke a na klas anọghị. Gas nyefe ozu bụ akpụkpọ gills nke na-ndokwa na ma parapodia, ma ke n'ihu, ndị isi nke ahụ ahụ ngalaba.

oke usoro mejupụtara obere metanephridia nke wepụ na-achọghị metabolic ngwaahịa nke coelomic ọmụmụ n'ime mpụga gburugburu ebe obibi. Onye ọ bụla nke nwere ya ụzọ excretory akụkụ na-emeghe si obere oghere - nefroporami.

Dị ka ụjọ usoro, ọ na-agụnye a typical peripharyngeal mgbanaka, nke departs si ventral akwara ụdọ. Ọ bụ na-akpali na fọrọ nke nta niile so na klas a nwere a ukwuu mepụtara akụkụ nke aka na isi. Na ụfọdụ ụdị, e nwere anya.

Polychaete ikpuru: omumu usoro na amụba

N'ihi na a mmalite na ọ bụ uru arịba ama na fọrọ nke nta niile ụdị otu a nwere ike asexual mmeputakwa, nke ọtụtụ mgbe na-anọchi anya ndị fragmentation nke ahụ, na-adịkarịghị site budding.

O sina dị, ụmụ anụmanụ nwere a na-mepụtara omumu usoro. Amụba nanị dioecious ikpuru. Gonads ii na mgbidi nke abụọ ahụ oghere. Ntọhapụ nke izizi mkpụrụ ndụ nwere ike rụrụ site anụ ahụ ọdịiche - na nke a na onye toro eto mmadụ nwụọ. Ụfọdụ ndị nnọchiteanya nwere kpọmkwem oghere site na nke ekenyela na gametes. Njikọta n'akparamagwa otu okenye ọkara. Site zaigọtụ amalite a nwa ahuhu, nke o doro anya na na-agba obere ihe yie ndị okenye. Ntem, mmepe na-eto eto worm emee na metamorphosis.