The gills act as the lungs intaking water and air and filtering back out again.
Nose hairs.
The nose is the first cleaned and moistened warm part of the respiratory system. The nose acts as a filter for air to get to the lower respiratory system.
Ozone can affect both lungs and respiratory system. It is because it acts as a pollutant over the surface.
bicarbonate buffer is instant, followed by respiratory, renal, and phosphate.
hydra has no specialized respiratory organs and exchanges of gases take place via simple diffusion from surface lining of the enteron on so in this way the surface lining of enteron acts as an efficient respiratory surface
Yes, it is.
It is the lining of the alveoli that acts as our respiratory surface.
Yes, but they're not identical. The mucus lining the respiratory system is used as a dirt (well, dust) trap. The mucus lining the digestive system acts as a barrier to the digestive juices (so that you don't try to digest yourself [see 'ulcers' as example of failure]).
Humane acts are acts of mercy or acts that make you "Human". Acts of Human are not always nice, an example would be pollution.
The Iris.
Inspiration is due to the contraction of the diaphragm and external intercostal muscles.
human acts?