- Industry: Education
- Number of terms: 4017
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Insieme di organi che hanno relativi ruoli nel funzionamento dell'organismo. Il sistema nervoso, sistema vascolare e sistema muscolare sono tutti i sistemi dell'organo.
Industry:Biology
Extensions of the water-vascular system of echinoderms, protruding from the body and often ending in suckers. May be used for locomotion and/or for maintaining a tight grip on prey or on the bottom.
Industry:Biology
内部管通过的空气采取为呼吸作用。脊椎动物有肺有一个单一的气管携带到肺里的空气，而昆虫和一些其他的土地生活节肢动物有气管携带空气从刚毛到身体的所有部位的复杂网络。
Industry:Biology
Appendages which are flexible, because they have no rigid skeleton. Cnidarians and molluscs are two kinds of orgnaisms which may have tentacles.
Industry:Biology
The last segment of the abdomen in many arthropods. May be flat and paddlelike, buttonlike, or long and spiny, as in the horseshoe crabs.
Industry:Biology
