I am not sure because there may be more context, but here is what I am guessing the answer is.
As Bryson pedaled uphill both his heartbeat and breathing rate increased. His breathing rate increases to provide the body (more specifically, exercising muscles) with oxygen at a higher rate and his heart rate increases to deliver the oxygen (and glucose) to the respiring muscles more efficiently.
The cavity which separate or in between the nose and the mouth is the nasal cavity.
The nose and the mouth meet at a junction called the pharnx; option A
<h3>What is nasal cavity?</h3>
The nasal cavity refers to a large, air-filled space above and behind the nose in the middle of the face. It is the cavity which divides the nose and mouth.
However, the nasal septum divides the cavity into two cavities .
- The larynx is the passageway for air between the pharynx above and the trachea below.
- The pharynx carries air, food and fluid down from the nose and mouth.
So therefore, the cavity which separate or in between the nose and the mouth is the nasal cavity.
Learn more about the pharynx:
brainly.com/question/3350759
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A: provided structural support to the cell
two hydrogen bonds are formed between adenine and thymine
