Highworth
Physiotherapy Clinic
Giraffes
have the same number of bones in their necks as humans. The bones
(cervical vertebrae) can be over 25cm long resulting in their much
longer necks. If they had more bones and joints the neck would be
unstable without more muscles and they wouldn't be able to hold it
upright. In fact almost all mammals have 7 cervical vertebrae and
only a small number, including a sloth and manatee do not.