As organisms increased in size and complexity, tubular systems evolved to transport substances into and out of the body with maximum efficiency. Although the final structure of tubular organs is ...

Abstract: Untethered miniature robots have significant potential and promise in diverse minimally invasive medical applications inside the human body. For drug delivery and physical contraception ...

Ever seen a lock with a round key and thought what wizardry it is? That’s a tubular lock, although some folks call it an Ace, barrel, or circle pin tumbler lock. It’s the go-to gadget for vending ...