sandhipaad

aarthropoda sangh ke praani

sandhipaad (arthopoda) praani jagat ka sabse bada sangh hai. pruthvi par sandhipaad ki lagbhag do tihaai jaatiyaaain hain, ismein keet bhi sammilit hain. inka shareer sir, vaksh aur udar mein bainta rahata hai. shareer ke chaaron or ek khol jaisi rachana milti hai. praay: sabhi khandon ke paarshv ki or ek sandhiyukt shaakhaang hote hain. sir par do sanyukt netr hote hain. ye jantu ekalingi hote hain aur jal tatha sthal donon sthaanon par milte hain. tilchatta, machhar, makkhi, gojar, jhinga, kekada aadi is sangh ke pramukh jantu hain.