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.
Characteristics of Mammals. Mammals have the following distinctive characteristics that put them in the class of mammals: Mammals have backbone and spines i.e. they are vertebrates. Mammals have hair or fur on their bodies.Mammals are warm blooded animals.haracteristics of Mammals. Mammals have the following distinctive characteristics that put them in the class of mammals: Mammals have backbone and spines i.e. they are vertebrates. Mammals have hair or fur on their bodies.