New answers tagged anatomy
It isn't just humans that have fused sacral vertebrae. Animals on the phylogenetic tree ranging from Squamata (lizards), to Aves (birds), to even Monotremata (egg-laying mammals) all have fused sacral vertebrae. The fused vertebrae can serve as a stronger, weight-baring structures for animals that do land locomotion, including humans. Any bones that have ...
Top 50 recent answers are included