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.
The two lungs are the primary organs of the respiratory system. Other components of the respiratory system conduct air to the lungs, such as the trachea (windpipe) which branches into smaller structures called bronchi. The process of breathing (respiration) is divided into two distinct phases, inspiration (inhalation) and expiration (exhalation). During inspiration, the diaphragm contracts and pulls downward while the muscles between the ribs contract and pull upward.