VPA 211: General Veterinary Parasitology and Helminthology (3+1)

NERVOUS SYSTEM

• Nervous system consists of circum oesophageal ring of fibre and paired ganglia.
• From which 3 pairs of nerves forwardly and 3 pairs of nerves run posteriorly which supplies to the entire body.
• Sense organ is absent in adults but seen in young larval stages.
  • Eg. Miracidium and Cercaria posses eye spots (patches of pigments).