The plantaris muscle is used by animals in gripping and manipulating objects with their feet - something you see with apes who seem to be able to use their feet as well as their hands.

• 梨鼻器是解剖学中一个很神奇的器官，它讲述着我们的性发展。这个结构位于鼻子里，是个探测信息素（引发性欲、警觉、或者食物线索信息的化学物质）的特殊“嗅觉”器官。