True or false the primary element in dense regular collagenous connective tissue is ground substance

Complete the following sentence that describe the alimentary canal and its walls: the is composed mostly of connective tissue, nerves, and vessels, which to nourish surrounding tissues.

What is crystallographic data processing and structure determination? what are the physical infrastructures of x-ray crystallographic structural biology? who can tell me detailed information? any would be appreciated. in advance!

Opium, methamphetamine, and cocaine are in the united states.