 
 <prompt> Wetin be di crucial element wey dey between di neck and abdomen of insect wey dey help dem to breathe? Based on di question wey dey above, write something wey get di answer inside. E fit be 1 - 20 sentences. Context: <response>: Insect wey dey respire no dey use lung. Instead, insect respiratory system dey use internal tubes and sacs wey gases fit diffuse or dey pumped actively, to deliver oxygen directly to tissues wey need am through their trachea. Since oxygen dey deliver directly, circulatory system no dey used to carry oxygen, so e dey greatly reduced. Insect circulatory system no get veins or arteries, instead e consist of small dorsal tube wey get holes wey dey pulse peristaltically. Towards thorax, dorsal tube dey divide into chambers and e dey act like insect heart. The other end of the dorsal tube dey like aorta wey dey circulate hemolymph, wey be arthropods' fluid wey be blood analog, inside body cavity. Air dey enter through openings for the sides of the abdomen wey dem dey call spiracles. 