Allergies Glossary: R
Description
This article is from the Health Articles series.
Allergies Glossary: R
Red Blood Cells Cells that transport oxygen from the lungs to all tissues of the body.
Reflux An abnormal backward or return flow of a fluid.
Registered Dietitian A registered dietitian is a food and nutrition expert that has met minimal academic and professional requirements enabling them to possess the credentialed RD. A registered dietitian can help you plan nutritious meals and snacks to make you healthy. There are nearly 70,000 dietitians who are members of the American Dietetic Association (ADA) the largest group of nutrition professionals in the nation.
Respiration Process of exchanging oxygen from the air for carbon dioxide from the body; includes the mechanical process of breathing, gas exchange, and oxygen and carbon dioxide transport to and from the cells.
Respiratory Distress Syndrome A lung disease that occurs primarily in premature infants; the newborn must struggle for each breath. The babys inability to get enough oxygen is reflected in the blue tinge to his or her skin.
Respiratory Failure Inability of the lungs to conduct gas exchange.
Respiratory Sensitivity A form of hypersensitivity affecting the respiratory tract. It includes ASTHMA and HAY FEVER.
Respiratory Tree The structure in the chest composed of the trachea, bronchi, bronchioles, and alveoli. It resembles an upside-down tree; also called the tracheobronchial tree.
Respiratory System The respiratory system and the circulatory system are responsible for supplying the body with oxygen and disposing of carbon dioxide. The respiratory organs, including the nose, pharynx, larynx, trachea, bronchi, bronchioles and the lungs, oversee gas exchanges that occur between the blood and the external environment.
Restrictive Lung Diseases Diseases that interfere with lung inflation; examples are pulmonary fibrosis, sarcoidosis, pneumo-conioses, diseases of the chest wall and pleura, and those of neuromuscular origin.
Retina The inner layer of tissue at the back of the eye that is sensitive to light.
Rhinitis An inflammation of the mucous membrane that lines the nose and the sinus cavities, often due to an allergy to pollen, dust or other airborne substances. There are different types of rhinitis including: atopic rhinitis, seasonal allergic rhinitis (also known as hay fever ), perennial rhinitis (year-round) with allergic triggers, perennial rhinitis with non-allergic triggers, idiopathic non-allergic rhinitis and infectious rhinitis.
Rhinitis Medicamentosa A form of non-allergic rhinitis caused by the prolonged use of decongestant nose drops and sprays.
Risk Factors Habits, traits, or conditions in a person or in the environment that are associated with an increased chance (risk) of disease.
Rotation Diet Rotation of an allergenic food into and out of the diet in order to reduce symptoms and increase tolerance to trigger foods, while preventing continuous multiple and cumulative exposure to commonly eaten foods.
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