Nā pepa ki'i embryonic: ko lākou'ano a me nā hi'ohi'ona ho'ohālike

'O nā hua'ōlelo Germinal ka hua'ōlelo nui i loko o ka hō'ailona. Ka mea, i hoʻokohu 'ia o ka fetus kino papa ma ke kakahiaka nui kahua o embryonic? Acaeoey. I ka hapanui o nā hihia, he mau epithelial kēia mau papa.

Ho'onohonoho'ia nā'ōmole momona i'ekolu'ano:

• ectoderm - ka lau i waho, kahi i kapa 'ia he' epiblasti a i 'ole ka'ili e'ili i ka'ili;

• endoderm - ka papa o loko o nā pūnaewele. Hiki ke kapa'ia ia he hypoblast a i'ole kahi pepa ma'amau;

• ka papa waena (mesoderm a mesoblast).

Hiki i ke'ōpona (e pili ana i kahi o ko lākou wahi, ua'ike'ia e nā hi'ohi'ona kūikawā o nā kelepona: e like me ka papa o waho o ka embryo he mau māmā māmā a lō'ihi, e like me ka epithelium cylindrical. ka mea, i ka flattened helehelena nana e like ia i ka mea e squamous epithelium.

'O ka mesoderm ma ka papa mua,'o ia nā pūlulu'ōlulu a me nā kelepulu. Ua lilo lākou he papa epithhelial. Pono ia'u e'ōlelo aku he nui nā mea noi'i e mana'o'i'o ana he mesonodona ka mesoderm kahi'a'ole kahi ha'aha'a kū'oko'a o nā pūnaewele.

'O ka mua o ka pahu e ho'ohui'ia i ke'ano he hollow formation, kahi i kapa'ia'o ka mea i ho'oili'ia i ka ma'i blastodermal. Ma kekahi o kāna mau ko'oko'o, ua hui'ia kekahi pū'ulu, kahi i kapa'ia'o ka pūnaewele. Hā'awi'ia ia i ke kēpau mua (endoderm).

Pono e'ōlelo'ia, ua ho'ohui'ia nā'ano like'ole mai nā pepa ho'okipa. Ke'ī mai,ʻo ko mākou hopohopo'ōnaehana kupu mai ka ectoderm, ka digestive Tube hoomaka mai ka endoderm, a me ka iwi, circulatory'ōnaehana a me nāʻiʻo originate mai ka mesoderm.

Pono nō ho'i e'ike'ia i loko o ke kōpokoolana, ua hana'ia nā membrane kūikawā. No ka manawa lō'ihi,'a'ole lākou e komo i ka hanana'ana o nā ohe a ke ola wale nō i ka manawa o ka ulu'ana o ka'ōpū. Kēlā me kēia papa o ke ola meaola hiki ke Hahai I kekahi hiʻona i loko o ke kahua, a me nā hale o ka leho o aeaiiuo.

Me ka ho'omohala'ana o ka ho'ohui'ana i ho'omaka i ka ho'oholo'ana i ka like like o nā embryos, i ho'ākāka mua'ia e K.M. 'O ka baer i ka makahiki 1828. Ma hope iki mai, ua hō'ike'o Charles Darwin i ke kumu nui o ka like like o nā'ōpoki o nā meaola a pau - ko lākou kumu maoli. Ua'ōlelo pū'o Severov e pili ana nā hō'ailona ma'amau i ka ho'ololi, kahi e ulu ai i ka hapanui o nā mea ma o ka anabolism.

I ka ho'ohālike'ana i nā kumu nui o ka ho'omohala'ana o nā'ōpomo o nā'ano like'ole a me nā'ano holoholona, ua'ike'ia kekahi mau hi'ohi'ona e'āpono iā mākou e ho'okumu i ke kānāwai o ka like'ana o ka ho'ohālike. 'O nā kumu nui o kēia kānāwai, he'ano like like nā'ano o nā meaola o kekahi'ano i ka ho'omaka'ana o ko lākou ulu. Ma hope iho, ua ho'ohālike'ia ka'ōpiopio e nā'ano ma'amau a pau e hō'ike ana i kona'ano o ka genus a me nā'ano like. Ma kēia'ano, ua ho'oka'awale'ia nā'ōpili o nā'elele o ka'ano ho'okahi mai kekahi i kekahi, a'a'ole i'ike hou'ia ko lākou'ano like.