Common Snail
The snail does not have a brain in the sense we think of one. Instead they have clusters of nerve cells known as pericarya which then make up ganglia. Mollusc nerve cells have no myelin sheath. The myelin sheath allows for extremely fast communication and nerve impulses. The nervous system of the snail is centered at the stomach region of the organism. Mollusks and annelids have common nervous systems and are closely related.
The snail does not have a brain in the sense we think of one. Instead they have clusters of nerve cells known as pericarya which then make up ganglia. Mollusc nerve cells have no myelin sheath. The myelin sheath allows for extremely fast communication and nerve impulses. The nervous system of the snail is centered at the stomach region of the organism. Mollusks and annelids have common nervous systems and are closely related.