<span>In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called MUSCULI PECTINATI.
Musculi pectinati or pectinate muscles are identified as specialized intracardiac muscle. The muscular ridges are like combs. These ridges help the right atrium dilate without much walls stress during adverse loading conditions.</span>
Answer:
Molecule is two or more atoms joined together
I believe the answer is littoral zones.
Sorry if I'm wrong, Hope this helps.
One disease is herpes simplex 1
