If you want to mix them in with the older hens, have the chicks in a little chicken tractor(or separate pen)just outside the older flocks run, when they are old enough to be outside. You can put your chicks outside when they are about 3 or 4 weeks old, but they still might need a heat lamp.
Inhalation is the process of bringing air into the lungs while exhalation is the process of pushing the air out of the lungs. Inhalation helps the body bring in oxygen and exhalation helps the body expel carbon dioxide. Continue Reading.
This page is about external respiration, which is the processes by which external air is drawn. the body in order to supply the lungs with oxygen, and (used) air is expelled. the lungs in order to remove carbon dioxide from to body. (The processes of internal respiration concern the exchange of gases in the lungs with those in the tissues and is described on the next page). Inspiration (= inhalation). Concentration of Gases. Expiration (= exhalation). 1. Intercostal muscles contract. 2.