صفحه محصول - پاورپوینت بيولوژی اكولوژی كژدم ها وپيشگيری از گزش آنها

پاورپوینت بيولوژی اكولوژی كژدم ها وپيشگيری از گزش آنها (pptx) 63 اسلاید

دسته بندی : پاورپوینت

نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 63 اسلاید

قسمتی از متن PowerPoint (.pptx) :

بنام خداوند جان و خردبيولوژي ،اكولوژي كژدم ها وپيشگيري از گزش آنها D.R.D Scorpions, which are grouped in the phylum Arthropoda . scorpion has a flattened elongated body and can easily hide in cracks. scorpion has a segmented tail that has a poisonous spike at the end. Scorpion stings are a major public health problem in many underdeveloped tropical countries, especially Africa, South India, the Middle East, Mexico, and South Latin America. The estimated annual number of scorpion stings is 1.2 million. An estimated 5000 deaths occur annually from scorpion stings worldwide Distribution Scorpions have a world-wide distribution, being found in deserts, grasslands, forests, intertidal zones (coast) and mountains.  World distribution of scorpions Size of scorpions The average size of a scorpionid is 3 to 9 cm.  The largest forms are the African genus Pandinus which reaches 18 cm, and Hadogenes spp which measures 21 cm long and weighs 32 grams.  Some Carboniferous scorpions are known to have attained lengths of 44 to 86 cm or even a meter. Pandinus imperator King of the Scorpions Probable reasons for development of venom in scorpions Food acquisition A-Venom can be an effective tool for predators. B-A second advantage of venom is that in many venom, enzymes are a major constituent. 2) Defense This is in fact is one of the most important property of venom, pain. It is more immediate and the offending animal immediately gets the message and may live to communicate it to others.