Nose hair with mucus and trapped pollen grain, SEM

Nose hair with mucus and trapped pollen grain, SEM

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Caption: Nose hair with mucus and trapped pollen grain, scanning electron micrograph (SEM). Nose hair helps to protect against organisms and foreign debris entering the nasal passages and lungs. It is larger than scalp or axillary hair in order to provide a larger surface area to collect foreign objects that pass through the nose. Specialized cells called goblet cells present in the nasal epithelial layer are responsible for producing mucus that coats the surface of the nasal epithelial cells. Mucus is a secretion consisting of a viscous colloid containing antiseptic enzymes and immunoglobulins. Foreign debris and organisms get trapped in the mucus. Nasal epithelial cells possess cilia (small hair-like threads) on their surface. The cilia beat rapidly back and forth pushing mucus back in towards the oropharynx where it can be either swallowed or ejected. Magnification: x140 when shortest axis printed at 25 millimetres.

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Keywords: 26792c, absorption, allergies, allergy, antiseptic enzyme, antiseptic enzymes, black and white, cilia, cilium, epithelia, epithelia layer, epithelial layer, epithelium, epithelium layer, foreign debris, foreign objects, goblet cell, grain, hair, hair cell, hair cells, human, human body, human hairs, immunoglobulin, immunoglobulins, medical, medicine, monochrome, mucosa, mucosae, mucous, mucous membrane, mucous membranes, mucus, nasal cilia, nasal cilium, nasal epithelia, nasal epithelia cell, nasal epithelia cells, nasal epithelia layer, nasal epithelial cell, nasal epithelial cells, nasal epithelial layer, nasal epithelium, nasal hair, nasal mucosa, nasal mucus, nasal passage, nasal passageway, nasal secretion, nose, nose cilia, nose cilium, nose hair, nose secretion, nostril, nostril hair, oropharynx, phlegm, pollen, respiratory system, respiratory tract, scanning electron micrograph, secretion, sem, spore

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