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.
To Install a Birdhouse: Bluebirds like wide open spaces at least 100 feet away from bushy or wooded areas, in both suburban and rural locations. In a meadow, field or mowed lawn, dig a hole that is one foot deep and one foot wide.Mix concrete in your wheelbarrow according to the package instructions. Insert the pole and pour the mixed concrete around it. Allow the concrete to set overnight until it is completely dry. For a safe nesting place for baby chicks, rough up the interior of the box so they can climb out. 2  To keep your bluebird friends coming back year after year, it's a good idea to check on your houses weekly to be sure other birds have not taken over.