The c shape of the tracheal cartilages is important because

The correct answer is: It allows large masses of food to pass through the esophagus when swallowing.

Explanation:

The trachea, or windpipe, is a hollow organ that connects the larynx to the bronchi and allows the passage of air so it can reach the lungs and make the gas exchange possible.

The trachea has cartilages around it to reinforce the tube for protection and to maintain the airway open. The places where there's cartilage are the anterior and the lateral sides of the trachea. This cartilage has the shape of an incomplete ring, or the shape of a C to allow the passage of food. The side that has no cartilage is the posterior side of the trachea, which is the side that is in relation to the esophagus - the part of the gastrointestinal tract that transports the food from the buccal cavity to the stomach.

69 is the correct math for the amino acids

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.