Skeletal and Organs Systems in Animals
Definition: Skeletal system is the system consists of bones and other connective tissues which protect and support the body. Animals are divided into 2 catogories: Vertebrates Invertebrates Vertebrates: Those animals which have a backbone and a skeleton. Examples: 1-Birds 2-Amphibions 3-Reptiles 4-Fishes 5-Mammals Invertebrates: Those...