acid
anatomical
anatomy
barrier
barriers
bile
biology
blood
blood brain barrier
bloodbrain
body
brain
care
chemical
damage
defense
desquamation
diagram
digestive
disease
education
epithelial
eyes
gastric
graphic
health
health care
healthcare
human
illustration
immune
immune system
immunity
infection
infographic
innate
internal
intestine
isolated
liver
lungs
lysozyme
medical
medicine
nasopharynx
organ
pathogen
peristalsis
physical
protect
protection
saliva
science
skin
skincare
spleen
stomach
structure
surfactant
system
tears
tract
treatment
定額
Innate immune system. Physical and chemical barriers for infection. Epithelial is a first line of defense against invading organisms. blood-brain barrier protects the nervous system from pathogens into human bodyの素材 [FY310182581599]
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