'O Mesoderm ka mea mua o nā'ano a me nā mea kino

'O ka pūpū o kekahi'ano'ōpiopio ka mea i'ike'ia i ke kūkulu'ia'ana o nā pepa embryonic. Oia primitive ano o na holoholona, e like coelenterates a me ka huahuakai nucleus he o elua wale papa: ka endoderm a me ka ectoderm. Me ka ho'oholo'ana o ka manawa, ke'ike'ia ka lā'ekolu, ka mesoderm, i nā'ano meaola like'ole.

He aha ka mesoderm?

'O ia'o ka ulu'ana o ka'ōpiopio, kahi e ho'ohui'ia ai me ka ho'ololi'ana o ka hanana a me ke anatomi o ka'ōpiopio o ka'ōpiopio. Mesoderm - Ua embryonic lau, a Radio nui i kūlana ma ke kahua o na mea he nui nā loko a me nā'aʻaʻa. 'O nā'ano like'ole o nā holoholona multicellular e like me ka hydras, ka ma'a, nā'āla ai'ole nā'ōni'a,'a'ole i kapa inoa'ia he'elua mau mea ola, no ka mea, ma ke ka'ina o ka ontogenesis, he'elua wale no'ōpuni kāpili.

Ka hana o mesoderm

'O ke'ano o ka waiho'ana i ka lau'ohokiho i waena o nā hui like'ole. Aia'ekolu mau'ano i kaulana loa i ka ho'okumu'ana o ka mesoderm: he laloblastic, enterocemental a me ectodermal.

1.'O ke alalani o ka mesoderm ka ulu'ana o ke'ano o nā holoholona kahiko, a ua kau'ia ma luna o ka ho'okumu'ia'ana o nā blastomeres. 'O kekahi o lākou he mea pilikino i ka ho'okomo'ana i ka lālā ulu lā'au, a lilo i ke'ano o nā lālā like'ole'elua. 'O kēia mau pūnaewele ke kumu o ka lālā.
2.'O ka'ōnaehana enterocele, he mea'oko'a loa ia ma ka ho'opa'a'ana o nā pūnaewele hanana o nā mesodermal i kahi invagination (invagination) me ka endoderm. 'O kēia hō'ano hou'ana i nā puka e hiki mai ana i kēia manawa. 'O ka palena ma waena o nā lālani'elua no ka manawa lō'ihi e hiki'ole ke'ike'ole'ia, a ma hope o ka lō'ihi o ka manawa,'o ka mesoderm ma ke'ano he kū'oko'a kū'oko'a e ho'oka'awale mai ka endoderm. 'O kēia'ano o ka ulu'ana he'ano kūpono ia o nā holoholona e like me ka ihe a me ka starfish.

3.'O ke'ano o ka hana ectodermal o ka mesoderm'o ia'ano'ano o nā holoholona e like me nā mea kolo, nā manu, a me nā momona (me nā kānaka). 'O ka laina lalo, aia ma hope o ka kahe'ana,'o ka endoderm wale nō i ho'okumu'ia. Inā mākou e no'ono'o i ke ki'i o ke'ōpipipiki i loko o kahi māhele, a laila ma hope o ka'ōpiopio (ke kikowaena o ka hana'ole) e loa'a kahi ka'awale ma waena o ka ento- a me ka ectoderm. Aia ma laila, a me nā "budding" pūnaewele o ka ectodermal, ke kumu e ho'oulu ai i kahi papahana embryonic hou.

Nā'ikehonua o ka mesoderm

'O ka hana ko'iko'i i ka ho'okumu'ana i ke'ōpipiki'o ka mesoderm. He He maikai evolutionary kālaimeaola hoailona, no ka mea, ka mea likeʻole i loko o ka morphology o ka waena germ, ahu iho i loko o kekahi pūʻulu o na holoholona i hoʻohana ma systematics.

Inā e no'ono'o mākou i'elua mau pū'ali lō'ihi, i hana'ia me ke'ano o ka ho'olālā'ana o ka mushroom, a laila, e pani'ia ka mesoderm e nā wahi hana hou. 'O ka'ao'ao hope o kēlā pēpē pēpili i māhele'ia i nā'āpana, ma ke kihi - i nā nephrotomes, a me ka'ōpū - i nā splanchnotomes.

He aha ke kuleana o ka mesoderm? Nā kino kanaka i hana'ia mai ka mesoderm

'O kēlā me kēia'ōpili'epika kahi'ano mua o nā pūnaewele o nā'ōpoki a me nā kinikini o ke kino e hiki mai ana. 'O ka topology o nā pepa i ho'ohālikelike nui'ia e ho'oholo i ko lākou hopena e hiki mai ana. No ka mea o ka mesoderm ka papa waena waena, ua komo'o ia i ka hana'ana o nā'i'o a me nā'ōpiopio e moe ana ma waena o nā māmā o ke kanaka a me nā mākau o loko o ke kino. 'O kŰia mau hanana ke'ano o ka mesoderm?

1. 'O ke kūkulu'ana o nā mea pilikino e pili ana mai nā pūnaewele mesoderm wale nō. 'O kēia mea he palena palena ma waena o nā papa i waho a me loko o ka mea kokoke i nā'ōpiopio o ka holoholona.
2. 'O ka pūnaewele musculoskeletal, kahi pū'ia me ka pū'ālua a me ka pūnaha muscle, kahi pūnaewele mesodermal kekahi. Here mākou i loko o manao ole wale na nāʻiʻo skeletal akā, i Muscle paia o na moku koko, naau, a me na nā loko a me nā hale. 'O ka'ōpū ka mea i ho'onohonoho'ia i loko o nā kānaka ma ke'ano o ka iwi iwi, a ma ka mea li'ili'i - cartilaginous tissue. Ke hiki mai i nā mele, ma kahi o ka'ōpipipone kahi e ho'okumu'ia ai ke ku'i, mai kānalua i ke kumu o kēia'ano axial me ka huela. Inā he'ano mo'omana'o maoli ka hopena o kēlā me kēia, a laila,'o ka hō'ailona'o ia ka'oki o ka'ōpū, a no laila ke kumu o ka pilina me ka endoderm.
3. Ho'okumu'ia nā'ōnaehana ho'onani a me nā hau'oli mai ka mesoderm. He pili lākou i ka hapanui o nā koho,'o ia ho'i ke'ano o ia mau mea i ho'ohālike'ia mai ka'ōmole'ōpona.
4. Aia kekahi pūnaewele mesodermal i ke kumu toto. Ho'okumu'ia ka na'au a me nā moku e nā pū o ka laulā waena waena.

Ka Hopena

'O Mesoderm kahi hanana pa'a o ka'ōpiopio, a me ka hopena o nā mea ola a me nā mea kino. I loko o nā 'auhau like'ole o nā holoholona, ke'ano o ka ho'omohala'ana a me ka ulu'ana o ka'ōpū waena, a'o kēia kekahi o nā hi'ohi'ona evolutionary. 'O ka hele'ana o ka mesoderm e hō'ike ana i nā holoholona he'ekolu,'o ia ka hō'ailona nui o ka holomua o ka pū'ulu.