Loratadine is an antihistamine that is sold under the brand name of Claritin. This medication is used to treat hay fever and allergy symptoms such as sneezing, runny nose, itching and watery eyes.
Epiglottis. The epiglottis is a flap of soft cartilage, covered by a mucous membrane. It is attached to the back of the tongue and acts as a valve during swallowing to prevent food and liquid from entering the lungs. This valve closes when we swallow food, liquid, even saliva, without us having to think about doing so.In other words, it is an unconscious action.t is attached to the back of the tongue and acts as a valve during swallowing to prevent food and liquid from entering the lungs. This valve closes when we swallow food, liquid, even saliva, without us having to think about doing so.
The valves prevent the backward flow of blood. Valves are actually flaps (leaflets) that act as one-way inlets for blood coming into a ventricle and one-way outlets for blood leaving a ventricle. Normal valves have three flaps (leaflets), except the mitral valve, which only has two flaps. The four heart valves include: Click image to enlarge. Tricuspid valve. This valve is located between the right atrium and the right ventricle. Pulmonary valve. The pulmonary valve is located between the right ventricle and the pulmonary artery. Mitral valve.