The aveolus is surrounded by capillaries. So capillaries carry deoxygenated blood to the alveolus where the oxygen from the alveolus diffuses into the blood in the capillaries. The deoxygenated blood is now oxygenated and is carried out of the lung via capillaries that then merge into the pulmonary vein.
In other words, alveolus does not have oxygenated blood it just puts oxygen into the deoxygenated blood hat this brought in.
Producers get the energy they need from the sun. Consumers get their energy from the plants and animals that they eat. Decomposers get energy from eating dead plants and animals.<span />
Heloooooooooooooooo.............
<span>amylase catalyzes the reaction; glucose is the product</span>
