<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>
Displacement is shortest distance from starting point, 4km.
Answer:
compound microscope/compound light microscope
they’re the same thing
if i can have brainliest that would be great
