A hypoplastic frontal sinus is an underdeveloped sinus cavity located in the center of the forehead. Approximately 10 percent of all adults have hypoplastic frontal sinuses. The frontal sinuses develop as a person ages, reaching full size after 20 years.Continue Reading
Sinus cavities are hollow areas in the skull found in the center of the forehead, in the cheekbones, behind the nose and between the eyes. These cavities are connected by a series of passageways and are lined with a soft, pink tissue. There are a total of eight sinus cavities, though some people are born with an extra one. Most of the sinus cavities drain mucus through the nose.
Acute sinus infections can cause inflammation of the sinuses and increased mucus production. The inflammation blocks the nasal passages and keeps mucus from draining. This blockage leads to headaches and general discomfort in the area of the sinus cavities. Frequent sinus infections can turn into chronic sinusitis.
Allergies may affect the pink tissues lining the sinus cavities, causing itching, sneezing and inflammation. Allergy shots and avoiding the substances that cause the reaction can help alleviate these symptoms. A deviated septum can increase the potential for sinus blockages, leading to a greater number of infections.Learn more about Human Anatomy
The oral cavity functions as the first part of the digestive tract, a secondary source of respiration, a sound manipulation area for speech and the location of sensory organs for taste. The oral cavity is the area directly behind the lips that extends to the top of the throat.Full Answer >
The mucosa, or mucus membrane, that can be found in the nasal cavity is highly vascular, helping to warm and moisten incoming air and is important for smelling since it is connected to the first cranial nerve, also known as the olfactory nerve. The mucosa contains large spaces that swell under contact with allergic reactions or infections.Full Answer >
The main function of pleural membranes is to hold the two lungs within their pleural cavity. These membranes do this while ensuring that the lungs remain expanded during out-breaths and can move along each other smoothly during the process of breathing.Full Answer >
The upper half of the respiratory system consists of the nasal cavity, larynx and pharynx, while the lower half consists of the trachea, bronchi and lungs. The upper part of the system conducts gases, while the lower part is responsible for gas exchange.Full Answer >