1.)which might occur if the kidneys did not function properly? signals could not be sent to the brain. fluid levels could not be maintained. solid waste could not be removed. nutrients could not be absorbed from food.2.)in the respiratory system, epithelial cells remove carbon dioxide from the body. act as a passageway by which air moves into the lungs. secrete fluids that protect the inside of the trachea.3.)alan chooses not to wear sunscreen because the oils build up on his skin. what is alan trying to prevent, and what is he failing to prevent? alan is trying to prevent skin cancer but failing to prevent acne. alan is trying to prevent acne but failing to prevent skin cancer. alan is trying to prevent psoriasis but failing to prevent eczema. alan is trying to prevent eczema but failing to prevent psoriasis. transfer oxygen to the cells in the body.4.)which of the following is a lymphatic disorder? lupus melanoma psoriasis seizure 5.)what is the difference between systemic circulation and coronary circulation? systemic circulation involves movement of the blood between the heart and the body, while coronary circulation involves movement of the blood within the heart. coronary circulation involves movement of the blood between the heart and the body, while systemic circulation involves movement of the blood within the heart. systemic circulation involves movement of the blood between the heart and the lungs, while coronary circulation involves movement of the blood within the heart. coronary circulation involves movement of the blood between the heart and the lungs, while systemic circulation involves movement of the blood within the heart.