I'm going to say syphilis. if it's not syphilis its probably chlamydia.
<span>The mitral valve does this between the left atrium and ventricle. The "lub" is the sound of the tricuspid and mitral valves closing. Each of your heart's ventricles has an outlet valve. The right ventricle uses the pulmonary valve to help move blood into the pulmonary arteries.</span>
Answer:
precognition is retro cognition
Explanation:
The answer would be "D. TRACHEA". It is because the first part of the pharynx which is the nasopharynx transports air from the nose down to your throat and eventually to the lungs where gas exchange between carbon dioxide and oxygen occurs.
