The vessels that carry blood away from the heart are called?.

Choice A rationale:

Sinuses are indeed air-filled cavities. They are hollow spaces in the skull and the face bones around your nose.

Choice B rationale:

Sinuses are located in the skull and around the nose. There are four pairs of sinuses, named for the bones that they’re located in.

Choice C rationale:

One of the functions of the sinuses is to help lighten the head. The air-filled cavities provide a sort of crumple zone that can absorb impact and protect the brain.

Choice D rationale:

Gas exchange does not occur in the sinuses. The primary function of the sinuses is to produce mucus that moistens the inside of the nose. This mucus layer serves to trap dust and other particles that might otherwise reach the lungs.

Choice E rationale:

The sinuses do not directly help with hearing. The structures that are primarily responsible for hearing are the ears, specifically the eardrums and the bones of the middle ear. So, the correct answers are Choices A, B, and C, after analyzing all choices. .

Choice A rationale:

The pleural fluid functions by lubricating the space between the pleura, allowing the pleura to glide smoothly during inhalation and exhalation. This cushions delicate lung tissues against friction from the ribs and the chest wall itself.

Choice B rationale:

The fluid in the pleural cavity does not warm and moisten lung tissue. This is not one of its primary functions.

Choice C rationale:

The fluid in the pleural cavity does not prevent bacteria from entering lung tissue. This is not one of its primary functions.

Choice D rationale:

The fluid in the pleural cavity does not assist in the diffusion of oxygen across the respiratory membrane. This is not one of its primary functions.