POY

POY, uzvi takya va harakat. 1) Dar hayvonot odatan chun uzvi harakat khizmat mekunad. Poyi hayvonoti gunogun az jihati paydoish va sokht az hamdigar farq mekunad. Poyi odditarin parapodiyaho, yane izofahoi jufti kutohu mushakii serharakati halqakirmho meboshand, ki har kadom az asos va du shokha (shokhai takhtapusht va shikam) iborat buda, bo mui durusht pushida shudaast. Dar bandpoyho parapodiyaho tashakkul yofta, ba vositai bugum bo badan payvast meshavand. Tortanakshaklho 4 juft va hasharot 3 juft Poy dorand. Poy hayvonhoi khordador toq va juft meshavand.

Poyi toqa dar hayvonhoi khordadori darajai past (masalan, mafsid), kirminai lundadahonho va mohiho dar namudi chinni pusti, dar obkhokiho boshad, dar namudi chinni umumi zohir megardad. Hayvonhoe, ki dar khushki zindagi mekunand, Poyi toqa nadorand. Poyi hamai onho juft buda, az se qism —kitf (dar Poyhoi pesh) yo ron (dar Poyi qafo), orinj (dar Poyi pesh) yo soq (dar Poyi qafo) va panja iborat ast. Dar jarayoni tahavvulot Poyhoi juft khele tagyir yoftaand. Masalan, Poyi peshi parrandaho ba bol, kaltakaloshoi bahriyu belpoyho ba bel, maymunho ba dast tabdil yoftaand. Dar yak qator holatho Poyhoi juft nest shudaand. Masalan, Poyhoi qafoi kitshaklho, du jufti khazandahoi bepoy, baze kaltakalosho, hamai morho.

2) Poyi o d a m az se qism iborat ast: ron, soq va panjai poy. Skeleti Poyi odam az ustukhoni ron, ustukhonhoi kalon va khurdi soq va ustukhonchahoi sarpanja, kafi poy va angushton tashkil yoftaast. Poyi odam ba vositai saraki ustukhoni ron ba ustukhoni kos payvast meshavad. Dar qismi ron mushakhoi darzi, pahnoi ron, chorsara, dusara va dar bandi Poy mushakhoi sesara, rostkunandai darozi angushton, mushakhoi kutohu darozi soqi khurd va gayra joygir shudaand. Hamai in mushakho vazifai khamu rost shudani Poyro ijro mekunand. Poy ba vositai arteriyai kos az khun tamin meshavad.