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.
2. Locate a limb between 6 and 20 feet off the ground to hang the birdhouse. How high the house is placed depends on the bird you want to attract. For example, bluebirds like their houses around 6 feet from the ground, while martins prefer higher boxes that are 15 to 20 feet from the ground.rap the cord around the tree trunk and hook the other end of the cord to the top eye hook on the opposite side of the house. Repeat with a second cord and the bottom two eye hooks. The cord should be snug but not too tight, so if the tree is still growing, the cord will not girdle the trunk.