a: Gross anatomy of lung and thorax. b ... rest on a thin layer of an electrolyte solution that is generated in part by the submucous glands. Ciliated columnar cells are also present in the ...

What Is the Respiratory System? The respiratory system is the organs and other parts of your body involved in breathing, when you exchange oxygen and carbon dioxide. All the cells in your body ...

From there, the heart pumps the blood through an artery that branches to distribute blood to itself and other body parts (except the lungs). The lungs work with the heart to oxygenate blood.