Mucus is secreted so that peristalsis can occur and can slide easily down you throat.
in the alveoli
The respiratory system's role in energy metabolism lies is to allow the exchange of gases to take place in the lungs and tissue cells. Oxygen is needed for certain metabolic reactions to occur and for the production of energy.
The gas occurs by simple diffusion through the cells.
Function: To secrete mucus to coat and protect the epithelia.Membrane: Mucous Membrane
Gas exchange does not occur in the respiratory tract, it occurs in the alveoli.
Gas exchange occurs in the alveoli in the respiratory system. The thin-walled structures allow diffusion of gases into and out of the capillaries.
Lungs
The cells that secrete mucus are the goblet cells. They are not considered glands and there are no glands that are mucous.
cilia regain normal function
Asthma Bronchitis Lungs cancer! Emphysema , Cough etc.
respiratory system change with more exercise because it is related to our cardiovascular and respiratory system.when we do exercise our heart rate increases cardiac output increases and oxygen is more utilizing and more energy is required.These all cause effect on respiratory system