Assertion: trachea | /r/HasProperty | d-shaped
Facets:
Source sentences:
text: The trachea consists of about 16-20 C-shaped rings of hyaline cartilage being located one above the other the cartilages are deficient posteriorly where the gap is filled up by connective tissue and involuntary muscle termed trachealis the absence of cartilages on the posterior aspect enables growth of esophagus during deglutition in cross section the trachea seems d-shaped or horseshoe-shaped.