Stomach mucosa
Nasal mucosa
The nasal mucosa consists of the respiratory mucosa (Regio respiratoria) and the olfactory mucosa (Regio olfactoria). The respiratory region is named after its function; it represents the first part of the respiratory tract. It covers the largest part of the nasal cavity.
It is found on the nasal septum, the side walls and in the nasal conchae. The uppermost cell layer of this mucosa is cylindrical in shape and has a cinchial layer. Kinozilien are microscopically small hairs whose function is the transport of dust or secretion rachenwärts.
Thus they keep the respiratory tract free. One of these hairs exerts 10 to 20 blows per second. The respiratory mucosa also contains cells for mucus production and immune defense.
The olfactory mucosa (Regio olfactoria), on the other hand, is found in the upper nasal concha, in the nasal dome, and in the upper part of the nasal septum. It contains the primary sensory cells that perceive the smell. This requires an “olfactory mucus”, which is produced by neighboring glandular cells (Bowman glands, Glandulae olfactoriae). It serves as a kind of washing-up liquid that transports odorous substances in a soluble form to the olfactory sensory cells. The mucosa of the paranasal sinuses has the same structure as that of the region respiratoria, but has fewer glandular cells.
The uterine mucosa
The lining of the uterus is also called endometrium (tunica mucosa). It contains uterine glands (uterine glands) which secrete an alkaline (basic) secretion. Its function is to protect against infections and to transport the egg.
Its composition is subject to cyclical fluctuations. The uppermost cell layer is cylindrical in structure and has microscopic hairs (kinocilia and microvilli) that serve to transport the egg cell. The uterine lining is particularly well supplied with blood: it contains spiral arteries, tortuous small blood vessels that change their shape depending on the day of the cycle and can increase or reduce the blood supply as required.
A distinction is made between two layers of the uterine lining. The upper layer is called stratum functionale. It changes during a cycle and is shed during menstruation. Below it is the stratum basale. It is not shed and forms the overlying layer.
