Erythropoiesis (from Greek 'erythro' meaning red and 'poiesis' meaning to make) is the process which produces red blood cells (erythrocytes).
Birds and mammals have the following characteristics in common: they are vertebrates, meaning they have an internal skeletonthey are warm-bloodedthey breathe using lungs, so â¦ have full respiratory systems they have circulatory systems. Most mammals give live birth, but there is a sub-group known as monotremes, which are the egg-laying mammals. 2  This group includes just the platypus and the echidna. 3  They are still mammals because, like all mammals, they feed their young on mothers' milk.
No, birds are not mammals. They do not bear live young, they lay eggs. They do not produce milk to feed their young. And they do not have hair, they have feathers.They metabolize nutrients differently, they have a different digestive tract, and they have lighter bones.hey are birds. mammals are covered with hair and give live birth and feed them from mammary glands (cows, people, cats, dogs, horses, etc).