Mene ne bambanci deuterostome da protostomes dabbobi

A kwatanta ci gaban rayayyun kwayoyin halitta iya sau da yawa samu sharuddan "protostomes" da "deuterostome dabbobi." Yana dukan data kasance kwayar fãce coelenterates, abin da ya bambanta a cikin tayi matakin.

Development of chordates

Chordata wakilta uku kungiyoyin na kwayoyin:

• tunicates ko lichinochnohordovymi (Tunicata, Urochordata), wanda da jakar jiki, a nannade daina kai hare hare.
• bescherepnyh ko golovohordovymi (Acrania), suke zaune a cikin acan karkashin ruwa kifi halittu masu kama da immobile.
• vertabrate - wakilan kifi, halittar dabba mai kafafuwa, macizai, da tsuntsaye, dabbobi da mutane.

Tarihi na asalin chordates ne tana tattare a cikin asiri, kuma Yanã da wani yawa na zato. Kuma ya zama mafi takamaiman, kana bukatar ka fahimci wanda da deuterostome protostomes da dabbobi. An sani cewa fiye da miliyan 500 da suka wuce akwai riga golovohordovye. A gabanin saukarwa da ya rage wani asiri ne me ya sa akwai daban-daban shiriritar game da asalin abubuwa masu rai.

TAKAITACCEN protostomes da dabbobi deuterostome

Shin kwayar dabba mulkin. Protostomes da deuterostome - su kai tsaye da kakanninsu. Su zane-zane da Protostomia fi'ili da kuma Deuterostomia kafa a kan halaye da kafa bakin gudan jini. A farko shi ne kafa daga m Gut bude (da blastopore), wanda aka kafa a cikin tayi. Na biyu - a cikin blastopore tasowa deducing cikin rami (dubura), da kuma bakin da aka yanka a sabon wuri.

Nau'in bilaterally fasali kwayoyin

Deuterostome protostomes da dabbobi suna da nasu rarrabuwa. By protostomes sun hada da:

1. Shellfish.
2. Annelids.
3. Sipunculans - tsutsa-kamar marine dabbobi, wanda ya bayyana a gaban wata rudimentary jijiyoyi, excretory tsarin da hanji madauki da dubura daga baya.
4. Echiura - kwayoyin da suke zaune a marine ruwaye. Bã su da jiki na cylindrical siffar da wani proboscis. Bakinka ne peritoneal gefe. Daga sauran mambobi sun bambanta da gaban underdeveloped jijiyoyi da hanji tube, wanda ƙare dubura.
5. Pentastomida ko Reed, waxanda suke da tsutsa-kamar harshe-parasitic invertebrate tare da kadan jiki, irin wannan arthropod.
6. Onychophora ko pervichnotraheynyh - gabatar da nazarin sasannin da yara a kan dogon jiki na wanda akwai up to 43 nau'i-nau'i daga kafafu.
7. Tardigrades - kananan kwayoyin da hudu nau'i-nau'i daga kafafu.
8. Arthropod.

Deuterostome dabbobi ko deyterostomy sun dauki wadannan iri dabbobi:

• chaetognaths.
• poluhordovym (nadkishechnodyshashie da krylozhabernye).
• echinoderms.
• Pogonophora.
• chordates.
• graptolites (ma'adanai).

Akayi na ci gaba deytorostom m. An yi imani da cewa su ci gaba fara ne da kwayar kwaro cewa ba rarraba da protostomes. Wasu yi imani da cewa magabatan suna deuterostome ƙananan tsutsotsi, wanda aka sanya a matsayin m iri protostomes.

Mene ne bambanci daga protostomes deuterostome

Bugu da kari ga ulla wannan mashiga wakilta bakinka, da kuma deuterostome protostomes dabbobi bambanta da dama sauran halaye:

1. Domin a yawan qwai ƙungiyoyin: a farko su ne radial, da umarni radiation, da kuma na biyu - Karkace (wadanda ba uniform).
2. Coeloms kwanciya hanyoyin (baka): y protostomes ci gaban sakandare ganuwar cavities farawa da cell division, yayin da protrusions an kafa daga deuterostome pouches tayi gut.
3. Biye da kwakwalwa Farawa: a protostomes - shi tasowa a cikin adulthood, da kuma na biyu - an rage da kuma dage farawa a cikin wani sabon yanki.

Saboda haka deuterostome ma kira vtorichnomozgovymi halittu.

Masana kimiyya yi imani da cewa deuterostome da protostomes dabbobi suna da magabata daya ne da suka rayu fiye da miliyan 500 da suka wuce a Edikarskom teku. Mazauninsu ga halittun da aka seabed, a cikin abin da ya motsa, aiki cilia kamanta stripe a ciki, da kuma ciyar da ta tentacles cewa tara abinci. Zai yiwu daga baya raya jiki sashi deuterostome magabatansu ware da kuma amfani da shi su yi ta tono a cikin for wani lokaci precoat Layer.

Deuterostome protostomes da dabbobi masu kama a ci gaba da kuma tsarin. Amma kuma sun gabatar da wani yawan bambance-bambance, don haka da cewa su mabiya sãɓawa jũna.