Part 1 Perhaps you have a health concern or know someone who does. What you do? You might start by researching the
issue on the internet or the library, or ask others, such as the school nurse or a doctor. These are good ideas, but when
conducting research, you may often find conflicting information. Which is correct? How can you tell? You should always
consider the source of the information. Is it from a person you trust? Is it from a reputable web site? How recent was the
book or article published? Has more recent medical research been done? Choose a personal health concern that someone
may have, such as acne, an eating disorder, a critical disease, like diabetes, an immune disorder, or a substance abuse
problem. Research information about the concern, using at least three to five sources. Evaluate the validity of the sources
and their information, then write 250 to 300-words describing how you evaluated the accuracy and the integrity of your
chosen sources. Be sure to include a list of all your sources.

Don recorded his food intake for a week and then used a computerized dietary analysis program to analyze his diet. according to the results of the analysis, his average daily saturated fat intake was 5% of total calories and his average daily unsaturated fat intake was 12% of total calories. based on this information, his total fat intake is the acceptable macronutrient distribution range.

The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. the respiratory system does this through breathing. when we breathe, we inhale oxygen and exhale carbon dioxide. this exchange of gases is the respiratory system's means of getting oxygen to the blood.respiration is achieved through the mouth, nose, trachea, lungs, and diaphragm. oxygen enters the respiratory system through the mouth and the nose. the oxygen then passes through the larynx (where speech sounds are produced) and the trachea which is a tube that enters the chest cavity. in the chest cavity, the trachea splits into two smaller tubes called the bronchi. each bronchus then divides again forming the bronchial tubes. the bronchial tubes lead directly into the lungs where they divide into many smaller tubes which connect to tiny sacs called alveoli. the average adult's lungs contain about 600 million of these spongy, air-filled sacs that are surrounded by capillaries. the inhaled oxygen passes into the alveoli and then diffuses through the capillaries into the arterial blood. meanwhile, the waste-rich blood from the veins releases its carbon dioxide into the alveoli. the carbon dioxide follows the same path out of the lungs when you exhale.the diaphragm's job is to pump the carbon dioxide out of the lungs and pull the oxygen into the lungs. the diaphragm is a sheet of muscles that lies across the bottom of the chest cavity. as the diaphragm contracts and relaxes, breathing takes place. when the diaphragm contracts, oxygen is pulled into the lungs. when the diaphragm relaxes, carbon dioxide is pumped out of the lungs. write one paragraph (at least 6 sentences) describing the path of oxygen through the respiratory system. also include why this "order of operations" is the way it is!

Explain what is meant by the phrase “ethical behavior”.