Pharyngeal ganglion in leech is a part of

The sub pharyngeal ganglion in leech is formed b y fusion of ________ pairs of ganglia.

The supra pharyngeal ganglion lies below the Pharynx and is formed by the fusion of four pairs of Ganglia. (False) Correct Statement: The sub pharyngeal ganglion lies below the Pharynx and is formed by the fusion of four pairs of Ganglia.

Pharyngeal tonsils are

Pharyngeal tonsils are

Leeches are

Leeches are

Leeches are

Leeches are

Identify the correct statements with reference to nervous system of Periplaneta (i) Brain is mainly sensory and an endocrine gland (ii) All thoracic ganglia supply nerves to the parts of their respective segments only (iii) Sixth abdominal ganglion is the largest of all abdominal ganglia (iv) Frontal ganglion is connected to ingluvial ganglion by a recurrent nerve