This document discusses the support systems of animals and plants. It explains that vertebrates have an internal skeleton called an endoskeleton that supports their body weight and protects internal organs. Invertebrates have external skeletons like exoskeletons made of chitin or hydrostatic skeletons using fluid pressure. Woody plants are supported by woody tissues, while non-woody plants use turgor pressure in cells or climbing structures like tendrils. Support systems provide organisms with proper shape, support body weight, and protect internal organs from injury.