Animals like starfish have small groups of neurons in each arm connected to a ring of neurons in the center. This type of nervous system is called _.
Correct answer: C. Diffuse nervous system
- A. Centralized nervous system
- B. Partially centralized nervous system
- C. Diffuse nervous system
- D. Partially diffuse nervous system
Explanation
The diffuse nervous system is the most primitive nervous system. In diffuse systems nerve cells are distributed throughout the organism, usually beneath the outer epidermal layer. Large concentrations of nerve cells-as in the brain-are not found in these systems, though there may be ganglia, or small local concentrations of neurons.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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