词根词缀：ecto-, ect-

【来源及含义】Greek: outside, external, beyond

【同源单词】ectobiology, ectoblast, ectocardia, ectocytic, ectoderm, ectodermal

词根词缀：skeleto-, skelet-, skele-

【来源及含义】Greek > Latin: dried up, withered, mummy; the bony and some of the cartilaginous framework of the body of animals; including humans

【同源单词】chondroskeleton, dermaskeleton, dermoskeleton, ectoskeleton, endoskeletal, endoskeleton