NEET PG DENTAL EXAM

Detailed explanation-1: -A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure.

Detailed explanation-2: -External sulci or grooves correspond to the internal partitions that divide the heart into chambers. There are anterior and posterior interventricular sulci or grooves and a coronary sulcus (atrioventricular groove). The coronary sulcus is circumferential and separates the atria from the ventricles.

Detailed explanation-3: -The sulci and fissures are both grooves in the cortex. However, they are distinguished by their size. While the sulcus is a shallower groove surrounding the gyrus, fissures are larger furrows dividing the brain into lobes and also into two hemispheres as the longitudinal fissure.