digestive system
oral cavity
salivary glands
esophagus
liver
stomach
gallbladder
duodenum
pancreas
small intestine
colon
rectum
anus
nervous system
big brain
medulla
spinal cord
cervical nerves
thoracic nerves
lumbar nerves
sacral nerves
spinal nerve
cervical Department
shoulder Department
sacral part
the lumbar spine
kopčikovyj Department
dorsal root nerve
the nerve fibres
kernel
nucleolus
tissue
axon
synapse