The main organs of the nervous system is the Brain and Spinal cord a bundle of nerves that begin at the brainstem and continue down the spine. and connects with peripheral nerves.
Nervous
System
Excretory system
Excretion removes cellular waste the main organs of this are the kidneys,ureters,bladder and the urethra
Excretory Systems
Digestive System
theres mechanical digestion and the primary organs of this are Mouth,Esophagus,stomach,small and large intestine,Liver,gallbaldder and pancreas
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