英文關鍵字
angleworm
anguine
annelida
biochemistry
biology
blood
coelum
college
colored
cord
cross
crosssection
disambiguation
dorsal
earthworm
education
examination
experiment
fixed
lab
laboratory
learning
lumen
macro
microscope
muscle
nephridium
nerve
oligochaeta
research
science
section
slide
stained
structure
study
teaching
tubules
university
vessel
zoology