Usually the legs and feet.
Yes, while skin impressions are rare, it is known that T-rex has scales on at least part of its body. Modern birds, which are now classified as dinosaurs, have scales on their feet.Other dinosaurs likely shared this characteristic.
A birds body parts are the wings,feet,claws,head,and body.
scales
The snake's scales
spine
Actually yes. While the chickens body is covered with feathers, the legs are scaled just as their ansestors were. If you look at a roosters legs you will see fine scales. Many breeds also have scaling around the beak.
brain or spinal cord
pollin
Scales help to protect the fishes body. They also help the fish be able to glide through the water.
I believe it is the skin that protects and covers the bones of your body.
Breasts are a part of the body. They are covered with skin.
SIMILARITIES. Birds, reptiles, and mammals are all a part of the animal kingdom! (OH MY GOSH!) They all need the same things- food, water, vitamins, nutrients, and things of the such. They are all multi-cellular, eukaryotic organisms. They all have the ability to mate and raise/have offspring. These three also all have similar body parts, and body functions. DIFFERENCES. Mammals give birth to live offspring- birds and some reptiles don't and lay eggs. Birds have the ability of flight- mammals and most reptiles do not. Reptiles are covered in scales or some other form of rough 'coat'- birds have feathers (though some like the Cassowary have some rough and slightly scaly napes and such), and mammals have fur and things of the such. Reptiles and most birds are warm blooded- mammals are cold blooded. Hope it helped! :D ~AP Wulf