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.
Bird & Mammal hearts have 4-Chambers; Right and Left Atria & Right and Left Ventricles. Having Hair or Feathers indicates the animal is endothermic (at all times), because ONLY Birds and Mammals fall this category. 2 people found this useful.LL The Typical/Usual Endotherms, (birds and mammals) have 4 chambered hearts, the atypical/unusual few reptiles and fish that fall into the category DO NOT have 4 chambered h â¦ earts.