What Are Alveolar Macrophages?

Pulmonary macrophages (pulmonary macrocrophage) are differentiated from monocytes and are widely distributed in the interstitial space of the lung. They are found around the tubes below the bronchioles and in the alveolar septum. Some macrophages migrate into the alveolar cavity, called alveolarmacrophage. Lung macrophages are very active in phagocytosis, immunity and secretion, and have important defense functions.

Lung macrophages

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Pulmonary macrophages (pulmonary macrocrophage) are differentiated from monocytes and are widely distributed in the interstitial space of the lung. They are found around the tubes below the bronchioles and in the alveolar septum. Some macrophages migrate into the alveolar cavity, called alveolarmacrophage. Lung macrophages are very active in phagocytosis, immunity and secretion, and have important defense functions.
Chinese scientific name
Lung macrophages
Latin scientific name
pulmonarymacrophage
nickname
Alveolar macrophages
boundary
animal world
distribution area
Intrapulmonary
Foreign particles such as dust particles and bacteria inhaled into the alveolar and interstitial spaces are mostly swallowed and cleared by macrophages. Therefore, dust particles, secondary lysosomes, and phagosomes are common in the cytoplasm of cells. Lung macrophages with a large amount of dust particles in the cytoplasm are also called dust cells. Lung macrophages can also engulf senescent red blood cells. When lung stasis occurs in patients with heart failure, a large number of red blood cells overflow from the capillaries and are swallowed by macrophages. The cytoplasm contains many hemoglobin decomposition products containing hemosiderin particles. This kind of lung macrophage is also called heart failure cell (heartfailurecell). Some macrophages phagocytosing foreign bodies are coughed out from the alveolar cavity through mucus flow and ciliary movement of the respiratory tract, and some enter the pulmonary lymph vessels and enter the lymph nodes with the lymph.

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