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.
Primates are mammals that share the following characteristics: 1  hair instead of fur. 2  fingernails instead of claws. 3  opposable thumbs. 4  higher brain-to-body size ratio/high level of intelligence. 5  prehensility (ability to grasp with fingers and/or toes) 6  padded digits with fingerprints.