UnScramble this Word: h e t s a d n c?

Questions

You can only smell 1/20th as well as a---------- .?

A human has a bone just after the spine ends, which proves that humans once had---------- .?

A LaForte fracture is a fracture of all ---------- bones.?

Human bones can withstand stresses of ---------- thousand pounds per square inch.?

Human ---------- are as strong as concrete.?