ជា​ទូទៅ​គ្រប់​ប្រភេទ​នៃ​សត្វ​ទាំងអស់​មិន​ថា​សត្វ​ស្លាប ឬ​សត្វ​ដែល​មាន​ជើង​បួន​នោះ​ទេ គឺ​សុទ្ធតែ​មាន​រូបរាង​សាក​សម​ទៅនឹង​ដងខ្លួន​របស់​វា​ទាំងអស់​ព្រោះ​នេះ​ជា​កត្តា​ធម្មជាតិ​ដែល​ផ្តល់ឲ្យ​។ ប៉ុន្តែ​ក៏​មាន​ករណីខ្លះ​អាច​ធ្វើឲ្យ​សត្វ​ទាំងនោះ​ខុស​ប្រក្រតី​ផង​ដែរ ដូច​ជា​សត្វ​មួយចំនួន​ខាងក្រោម​នេះ​អញ្ចឹង​សរីរាង្គ​នៅ​ផ្នែក​ខ្លះ​របស់​វា​ត្រូវ​បាន​ផ្លាស់ប្តូរ ដោយ​មាន​ក​ខ្លី មើល​ទៅ​ដូច​ជា​កន្តឿ​ តើវាជាការ​កែ​ដោយហ្វូតូសប ឬ​មកពីកំណើត​។
​សូម​ទស្សនា​រូបភាព​ដូច​ខាងក្រោម​៖
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