A Brief Over-view of the Etymology of Modern Goju-ryu Karate-do Kata. By Joe Swift and Mario McKenna. It is now well documented that Okinawa karate is indebted to the Southern schools of Chinese boxing for much of its technical knowledge and expertise.
Best Answer: They are all warm-blooded, and they all have hair even if you can't see it (including dolphins and whales). Mammals all share mammary glands (milk producing glands). This is the biggest feature, also mammals use 3 bones for hearing and they have hair. Should be noted that endothermy (warm-blooded) is not unique to mammals, birds also share this characteristic.
Mammals are a class of animals belonging to the Phylum Chordata and Subphylum Vertebrata. They are defined by certain characteristics which all mammals share, including: glandâ¦s that produce milk, hair, three bones in the middle ear, and a neocortex in the brain. Most mammals are born live, but there are exceptions.