Moreover just glancing at Giraffe physiology shows us all the compromises that a long neck entails. For instance it's long neck traps a lot of air in it's brea

Moreover just glancing at Giraffe physiology shows us all the compromises that a long neck entails. For instance it's long neck traps a lot of air in it's breathing cycle, requiring larger lungs for the same oxygen capacity. It has twice the blood pressure of a human to enable pumping up the long distance, and as such a giant heart. It has a complex circulatory system to control the change of blood pressure at it's brain when it bends over, and handle the high blood pressure in it's legs. And so on and so forth.