TULAK

TULAK, pustpartoii mavsimii hayvonot. Bemuhragon (kharchangshaklho, chilpo, hasharot va digari bugumpoyho, inchunin baze kirmho va gayra) hangomi tulak pusti kuhnaro partofta, pusti nav mebarorand, ki in sharti asosii inkishofi organizm meboshad.

Tulaki hasharot beshtar zeri tasiri gadudi tulak — ekdizon surat megirad.
Tulaki muhradoron — obkhokiho, khazandaho (biduni timsohho va aksari sangpushthoe, ki pust namepartoyand), parrandaho va shirkhurho sharti zarurii tajdidi pusthoi fasurda buda, na ba marhalai inkishof, balki ba tagyiroti mavsimi alokamand ast.
Badi tulak bolu par va muy zich shuda, rangi digar megirad. Dar davrai tulak dar organizmi hayvonot mubodilai safoda vusat megirad, oksigen beshtar istemol meshavad.