has part
in taxon
develops from
capable of
composed primarily of
existence ends during
immediate transformation of
neuron
neural cell
nervous system process
Porifera
Eumetazoa
Homo sapiens
fully formed stage
anatomical system
embryo
nervous system
gustatory system
skeletal system
musculoskeletal system
biliary system
exocrine system
hematopoietic system
immune system
integumental system
hepatobiliary system
entire sense organ system
future nervous system
excretory system