MHT CET Medical202622 April 2026Morning ShiftBiologyAnimal KingdomActual
In Planaria , the nervous system consists of ____.
Options
- Aa single ventral nerve cord, an inverted U shaped brain, a pair of eyes located ventrally
- Ba pair of ventral nerve cords, a pair of eyes located dorsally, an inverted U-shaped brain with ten branches o
- Ca mass of cerebral ganglion with nine branches of nerves arising from each ganglion, a pair of ventral nerve c
- Dan inverted U-shaped brain, a pair of ventrally placed eyes, peripheral nerve plexus arising laterally from ne
Correct answer
C. a mass of cerebral ganglion with nine branches of nerves arising from each ganglion, a pair of ventral nerve c
Step-by-step solution
The nervous system of Planaria is ladder-like. It consists of a bilobed brain or cerebral ganglia located in the head region. From each cerebral ganglion, nine branches of nerves arise to supply the anterior and lateral parts of the head. Two longitudinal ventral nerve cords arise from the brain and extend posteriorly. These nerve cords are interconnected by transverse nerves called commissures, giving the nervous system its characteristic ladder-like appearance. Additionally, Planaria possesses a pair of simple ey