Na-amalite amalite development oge

Ọge mmalite ọkpụkpụ, kwuru na dị ka embryogenesis, sitere si a compound nke nuclei nke nwanyi na nwoke gametes na-anọchite anya ndị njikọta usoro. Ya mere, n'ihi na ndị nke na-agbasaghị tupu-Natal mmepe, embryogenesis agwụ na nwa, na ntule na ụdị larval mmepe - ahapụ ẹmbrayo membranes.

Na-amalite amalite development oge nwere ọtụtụ nkebi:

1.Zigota. Na njikọta spam nwoke na mmekọahụ cell, na-eru egg, akpali iche ya mmepe. Ọ na-amalite ime chemical na n'ụzọ anụ ahụ Filiks na-eme ka e guzobere symmetry nke egg, mkpochapu membranes nuclei, dapụtara na abụọ cell nuclei fuuz, na-kpụrụ nke DNA.

2. ndinuak (mbụ ogbo mmepe nke zaigọtụ) - a nkewa nke zaigọtụ. Na egg, nke na-akpụ akpụ ala fallopian tube, grooves ii, adịru e cell nkewa. Kpụrụ n'ụzọ dị otú a na mkpụrụ ndụ a na-akpọ morula. Nke a nzọụkwụ nwalere niile multicellular ntule na mụta nwa mmekọahụ dị iche iche bụ nanị usoro nke cell nkewa (radial, bilateral, gburugburu).

A ikpehe cell nkewa bụ na ha anaghị eto. Nke a bụ ihe e guzobere otu isi sel (egg cell) ukwuu nke obere mkpụrụ ndụ na ole cytoplasm nso nuclei.

Ọge mmalite ọkpụkpụ anaghị akwụsị ebe a, tụlee ndị na-esonụ na mmepe nke ẹmbrayo na ogbo.

3. The blastula (guzobere multicellular owuwu n'ụdị a afụ) - mejupụtara a oyi akwa nke mkpụrụ ndụ na-ezo dị ka na-amalite amalite. blastula size abịakwute size nke egg, n'ihi ya, n'oge cell nkewa, ọnụ ọgụgụ nke nuclei na DNA na-abawanye.

4. Gastrulation - nzọụkwụ ije nke na-amalite amalite na mkpụrụ ndụ, na-akpata guzobere atọ oyi akwa na-amalite amalite mpempe akwụkwọ. A na ogbo e ji na-abawanye na njikọ nke na-edozi na ribosomes, na oge a na e nwere protrusion nke osisi (vegetative) blastula n'ime, abụghị okporo osisi na-njikọ, a na a oghere na-tutu amama blastula. Nke a na-emepụta a ọhụrụ uji eze, na-akpọ blastopore ma ọ bụ isi n'ọnụ.

N'ihi ya, a dị mkpa torque gastrulation nwa mmepe, ebe ọ bụ na ọge mmalite ọkpụkpụ na a ogbo enyere guzobe ya na akụkụ na anụ ahụ na ngwa usoro.

Ọ ga-kwuru, e guzobere nke anụ ahụ na akụkụ nke ẹmbrayo na dị iche iche oge dị iche iche uche na-emebi ihe na gburugburu ebe obibi mmetụta, dị ka na-efe efe, radieshon ma ọ bụ chemical elekọta mmadụ. A oge nke mụbara uche na-akpọ oké egwu, e nwere mụbara likelihood nke na-emepe emepe abnormalities.

Ka ihe atụ, okpụkpụ nwa bụ a ole na ole dị oké egwu ihe. Ka anyị tụlee ha na ndị ọzọ zuru ezu:

1. blastula oge (mbụ izu abụọ mgbe a tụụrụ ime ya) - nwa ma na-anwụ anwụ, ma ọ bụ na-aga n'ihu ka ha webata enweghị deviations. N'oge a dị ukwuu nke dies embrayo (40%), nke malitere ha mmepe nke mutated izizi mkpụrụ ndụ.

2. On nke iri abụọ nke seventieth ụbọchị mgbe njikọta - oge nke ukwuu vulnerability nke ẹmbrayo ka amalite tọgbọrọ na-etolite niile dị oké mkpa akụkụ.

3. The nwa ebu n'afọ na oge e ji eto ngwa ngwa nke nwa ebu n'afọ. Ebe ezi mgbe e nwere ike ịbụ a mebiri ya mmepe naanị na ndị akụkụ, bụ ndị na-adịghị agwụ agwụ ha guzobere.

N'ihi ya, na-amalite amalite ontogenesis oge ji guzobe na mmepe nke ẹmbrayo na site na cell nkewa, guzobere nwere anụ ahụ, na akụkụ na usoro. Dị iche iche ntule ịdị iche iche nke a oge, ma ọ bụla ikpe, ọ na-amalite mgbe a tụụrụ ime na-agwụ na ọmụmụ nke a ndụ ọhụrụ.