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.
As a group, primates (including humans) share a suite or constellation of characteristics that differentiate them from other mammals and other animals. These characteristics may be viewed as. evolutionary trends. within the primate group and as such are not developed to the same degree in all primate species.s a group, primates (including humans) share a suite or constellation of characteristics that differentiate them from other mammals and other animals. These characteristics may be viewed as. evolutionary trends. within the primate group and as such are not developed to the same degree in all primate species.