Some animals have a skeleton on the OUTSIDE, not inside their bodies These animals include insects, arachnids (spiders) and other animals that are in the group called arthropods Turtles and lobsters are two animals with an exoskeleton
the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
as well as the armor of armadillos and many reptiles, and the shells or hardened integument of numerous invertebrates; external skeleton; dermoskeleton
The hardened parts of the external integument of an animal, including hair, feathers, nails, horns, scales, etc
An articulated mechanism whose joints correspond to those of a human arm When attached to the arm of a human operator, it will move in correspondence to his or her arm Sometimes used a prosthesis devices for handicapped humans See Prosthetic Robot
An external skeleton of an animal, serving as a protective and supportive covering for its softer parts; e g the outer shell of a brachiopod or pelecypod, the system of sclerites covering the body of an arthropod, or the bony plates covering an armadillo