A sheep has so much fat around it's heart to protect the valves in  the heart. There is also a lot of fat there to maintain the body  temperature of the heart.
Definition and Causes. Upper respiratory tract infection (URI) is a nonspecific term used to describe acute infections involving the nose, paranasal sinuses, pharynx, larynx, trachea, and bronchi.The prototype is the illness known as the common cold, which is discussed here, in addition to pharyngitis, sinusitis, and tracheobronchitis.efinition and Causes. Upper respiratory tract infection (URI) is a nonspecific term used to describe acute infections involving the nose, paranasal sinuses, pharynx, larynx, trachea, and bronchi.
Symptoms of Upper Respiratory Infections include runny nose, nasal congestion, sneezing, postnasal drip, cough, sore throat, headache, breathing difficulty, fever (in children), fatigue and other symptoms associated with specific conditions.ome common types of Upper Respiratory Infections include Sinus Infection, Rhinitis, Common Cold, Otitis Media, Nasopharyngitis, Epiglottitis, Pharyngitis, Laryngitis, Tonsilitis, Tracheitis and so on and so forth. Colds are mostly caused by Rhinoviruses and Corona viruses.