Most invertebrates have a nervous system.
Afferent information is information that is inbound to the nervous system.
Most invertebrates have afferent information inbound.
What have afferent information inbound?
1) fur seals
2) energy of moving objects
3) electromagnetic energy
4) sensory neurons
5) Electric devices
6) Most invertebrates
7) matter vibrating
8) Veins and arteries.