what do alveoli look like?
604402
Each alveolus is cup-shaped with very thin walls. It's surrounded by networks of blood vessels called capillaries that also have thin walls. The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.
498306
Large surface area - many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
68842
The alveoli provide a surface where the exchange of gases can take place. ... The walls of the alveoli are supplied with an extensive network of blood vessels. So lungs maximise the area for gaseous exchange through the presence of large number of alveoli which are richly supplied with blood.
803854
The alveolar septum or wall consists of three components: epithelium (which lines the alveolus or air space), interstitium, and capillary endothelium. Gas exchange occurs in the alveoli across the thin epithelial lining and adjacent endothelium (air–blood barrier).
590448
Bronchioles and alveoli in the lungs. In your lungs, the main airways (bronchi) branch off into smaller and smaller passageways — the smallest, called bronchioles, lead to tiny air sacs (alveoli).
401234
The respiratory bronchioles have single alveoli off their walls. The epithelium is ciliated cuboidal epithelium and contains some secretory cells called clara cells. The respiratory bronchioles lead into alveolar ducts, (which are surrounded by smooth muscle, elastin and collagen), which lead into the alveolar sacs.
1135825
An alveolus (plural: alveoli) is a word used in anatomy for hollow cavities, which are empty areas within a body. Although there are many different types of alveoli in the body, the word alveoli is usually used to talk about small air sacs in the lungs of mammals. These are also called pulmonary alveoli.
1341894
Alveolar ducts are tiny ducts that connect the respiratory bronchioles to alveolar sacs, each of which contains a collection of alveoli (small mucus-lined pouches made of flattened epithelial cells). ... Distal terminations of alveolar ducts are atria which then end in alveolar sacs.
964362
Alveolar macrophages. Alveolar macrophages are mononuclear phagocytes found in the alveoli of the lungs. They ingest small inhaled particles resulting in the degradation, clearance and presentation of the antigen to adaptive immune cells.
1472882
The alveolar process has a supporting bone, both of which have the same components: fibers, cells, intercellular substances, nerves, blood vessels, and lymphatics. The alveolar process is the lining of the tooth socket or alveolus (plural, alveoli).
570724
A typical pair of human lungs contain about 300 million alveoli, producing 70 m2 (750 sq ft) of surface area. Each alveolus is wrapped in a fine mesh of capillaries covering about 70% of its area. The diameter of an alveolus is between 200 and 500 μm.
1453994
There exist two types of alveolar cells: type I (the prevailing type) and type II alveolar cells. Type I alveolar cells are squamous extremely thin cells involved in the process of gas exchange between the alveoli and blood. Type II alveolar cells are involved in the secretion of surfactant proteins.
1004232
Alveolar ducts are conducting regions are lined by knob-like projections of cuboidal epithelium that cover small amounts of smooth muscle. These projections of cuboidal epithelium are often located on either side of the entrance into alveolar sacs, which branch from the “walls” of the alveolar ducts.
88458
How are the alveoli designed to maximize the exchange of gases? ... The alveoli are thin-walled and richly supplied with a network of blood vessels to facilitate the exchange of gases between blood and the air-filled in alveoli. They have a balloon-like structure that provides maximum surface area for exchange of gases.
410270
Lung tissue consists mainly of alveoli (Figure 16.2. 6). These tiny air sacs are the functional units of the lungs where gas exchange takes place.
689156
Lung tissue consists mainly of alveoli (Figure 16.2.6). These tiny air sacs are the functional units of the lungs where gas exchange takes place.
1170697
Alveolar-capillary membrane is composed of alveolar (epithelial) cells, interstitium, and capillary (endothelial) cells. Surfactant, a phospholipid, produced by type II cells, lines the internal surface of the epithelial cells.