1.
outer covering of humans and all other animals with a backbone
skin (piel)
2.
an animal that breathes air, has a backbone, and grows hair at some point during its life. In addition, all female mammals have glands that can produce milk.
mammals
3.
the content of the hard-shelled reproductive body produced by a bird, considered as food
eggs
4.
any organism that is able to live both on land and in water. especially : any of a class of cold-blooded vertebrate animals (as frogs and salamanders)
amphibians
5.
part of a fish
scales
6.
is the body part that helps a fish breathe underwater
gills
7.
one of the soft, fringed plumes that cover the bodies of birds.
feathers
8.
birds use this to fly
wings
9.
the thick hair that covers the bodies of some animals, or the hair-covered skin(s) of animals, removed from their bodies
fur
10.
he organs, or body parts, in humans and many other animals that allow them to hear.
ear
11.
he organs, or body parts, in humans and many other animals that allow them to hear.
