The function of the respiratory system is to deliver air to the lungs. Oxygen in the air diffuses out of the lungs and into the blood, while carbon dioxide diffuses in the opposite direction, out of the blood and into the lungs.Respiration includes the following processes: Pulmonary ventilation is the process of breathingâinspiration (inhaling air) and expiration (exhaling air).xternal respiration is the exchange if oxygen and carbon dioxide between the blood and air in the lungs, and internal resparation is the exchange of gases between blood cells of the body.
Boxes can be painted or stained with a light color on the outside and left natural on the inside. Birdhouses for Eastern Bluebirds should be approximately 4 x 4 inches to 5 x 5 inches with entry holes that are either 1 inch round holes, 1 3/8 x 2 vertical oval holes or 1 1/8 inch horizontal slot entrances.
1 First, decide on the size. 2  You will need 2 square feet of floor space per chicken, and one nest box for every three hens. 3  Nest boxes should be about a foot square. 4  For instructions, you might want to check out this page. 5  For larger breeds such as Jersey Giants, allow an additional square foot of floor space per bird. Plan to frame the coop with 2-by-4s and use sheets of plywood for the walls. 2  The roof can be a sheet of plywood covered with roof shingles or simply a piece of sheet metal. 3  A 5x20-foot run will keep a small flockâsix to eight hensâhappy. 4  More space is better if you have the room.