Oxygen and carbon dioxide travels to and from tiny air sacs in the lungs, through the walls of the capillaries, into the blood. Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.

C) The condenser
Condenser is used to collect and focus the light from the illuminator on to the specimen.
Thalassemia is a result of a quantitative production causing mutation in globin genes. The hemoglobin which is the protein being affected in thalassemia is consist of heme, alpha globins and beta globins. Any changes in the following causing abnormalities leading to disorders of heme production and above mentioned elements.
Fermentation is the process by which a carbohydrate molecule is broken down into alcohol and carbon dioxide in the absence of oxygen. During this process, two molecules of ATP is produced. In the absence of oxygen, pyruvate formed from glycolysis will undergo fermentation process. During the process of fermentation, NADH from glycolysis will be converted back to NAD+. This is necessary in order for glycolysis to continue. Thus, fermentation regenerate more NAD+ and only a few molecule of ATP.
Answer No 1:
Neutral fats such as triglycerides are made up of chains of fatty acids. These molecules are used for storing energy in the body. Also, as they form layers of fat in the body, they provide insulation to the body.
Any extra calories that are not required by our body are converted into triglycerides. The molecules of triglycerides are then stored in our body and used upon need.
Answer No 2:
Lipids are organic molecules that are<u> insoluble </u>in water.
Lipids can be described as a class of macromolecules which do not dissolve in water bur can dissolve in non-polar solvents. The lipids are the main constituent of cell membranes and also are involved in storing energy.Lipids are also used for cell signalling.