Question

a bone marking called a ramus is: an extension of a bone making an angle to the rest of the structure a chamber within a bone, normally filled with air a smooth, rounded articular process a large, rough projection i dont know yet

Explanation:

A ramus is defined as an extension of a bone that makes an angle with the rest of the structure. A chamber within a bone filled with air is a sinus. A smooth, rounded articular process is a condyle. A large, rough projection is a tuberosity.

Answer:

an extension of a bone making an angle to the rest of the structure