Invertebrate nervous system

major structure of the invertebrate central nervous system

simplest form of a nervous system: neurons are found spread apart, allowing the organism to respond to its environment

pair of structures in the brain of arthropods and some annelids

Amphids (Greek: amphi, around, double) are innervated invaginations of cuticle in nematodes. They are usually found in the anterior (head) region of the animal, at the base of the lips. Amphids are the principal olfactosensory organs of nematodes. Each amphid in C. elegans is made up of 12 sensory neurons with ciliated dendrites. The neurons have multiple shapes, such as single cilium, double cilia, wing-like cilia, and dendrites embedded in the sheath-cell with villa. Other nematodes, such as Bursaphelenchus xylophilus, have different configurations of specific types of neurons, with B. xylop

part of the arthropod and insect central nervous system