The respiratory membrane is formed where the walls of a capillary touch the walls of an alveolus. At the respiratory membrane, gas exchange occurs freely between the air and blood through the extremely thin walls of the alveolus and capillary. Septal cells and macrophages are also found inside the alveoli.
Little or no pollen should be showing oil the actual flowers (those red or green button-like parts in the center of the colorful bracts). Be sure the plant is well wrapped when you take it outside on your trip home because exposure to low temperatures for even a short time can injure leaves and bracts. Unwrap the plant as soon as possible because the petioles (stems of the leaves and bracts) can droop and twist if the plant is left wrapped for too long. For maximum plant life, place your poinsettia near a sunny window Or Some other well-lighted areas Do not let any part of the plant touch cold window panes.
Broadleaf evergreen trees and shrubs, such as the Southern magnolia, keep their leaves during the winter. However, leaves do eventually grow old and die. A plant may drop as much as one-third of its leaves at a time. (Matt Rose, Nola.com | The Times-Picayune) QUESTION: My magnolia recently has taken a downturn.