英文關鍵字
abscess
anal
anatomy
anus
biology
bowel
canal
colon
columns
condition
cross
diagram
diarrhea
digestion
digestive
disease
disorder
external
fissure
fistula
gland
gut
health
healthcare
hemorrhoid
human
illustration
infection
inflamed
inflammation
internal
intestine
large
medical
medicine
nutrition
pain
painful
rectum
section
sinuses
structure
swollen
system
tissue
veins
xray