abdomen
anatomy
antibiotic
asthma inhaler
asthmatic
backgrounds
breathing exercise
bronchitis
chest
cigarette
clinic
cold and flu
doctor
exploration
healthcare and medicine
healthy lifestyle
hospital
human bone
human heart
human internal organ
human intestine
human lung
human skeleton
human spine
illness
image
inhaling
inside of
letter x
medical exam
medicine and science
mucus
one person
oxygen
patient
people
pneumonia
radiation
radiologist
rib cage
science
smoke
the human body
thorax
tuberculosis bacterium
x ray image