Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of:
a) smooth muscle
b) skeletal muscle
c) respiratory cilia
d) rings of cartilage

Lilia is managing her high blood pressure. which type of technology could she use to her with this task? an automated blood pressure monitor at the grocery store an app that allows her to write her own prescriptions an emergency nurse hotline with available 24 hours a day a satellite urgent care clinic connected to her medical records