brain or nervous system cells are called as neurons
They consist of double-bond and single bond, according to the type of DNA.
A shield vol may be produced by hot spots which lay far away from the edges of tectonic plates. Shields also occur along the mid-oceanic ridge, where sea-floor spreading is in progress and along subduction related volcanic arcs.
The organs for digestion, excretion, and reporduction arelocated in the
Abdominal cavity
