Question

1)rings of cartilage are present in trachea.why
2)name the reserve food materialin human that generate energy
3)the moment of flood in small intestine is know as ​

Answer 1

Explanation:

The cartilaginous rings are incomplete to allow the trachea to collapse slightly so that food can pass down the esophagus. A flap-like epiglottis closes the opening to the larynx during swallowing to prevent swallowed matter from entering the trachea