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Information about Alveolar Duct

Detailed drawing of the alveoli from Gray's Anatomy, 1918 - Schematic longitudinal section of a primary lobule of the lung (anatomical unit);
r. b respiratory bronchiole;
al. d alveolar duct; at atria;
a. s alveolar sac;
'a' alveolus or air cell;
p. a.: pulmonary artery;
p. v pulmonary vein;
l lymphatic;
l. n lymph node.] | Image2 = Gray974.png | Caption2 = Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.
1, bronchiole;
2, respiratory bronchiole;
3, alveolar duct;
4, atria;
5, alveolar sac;
6, alveolus or air cell:
m, smooth muscle;
a, branch pulmonary artery;
v, branch pulmonary vein;
s, septum between secondary lobules. | System = | MeshName = | MeshNumber = | DorlandsPre = | DorlandsSuf = |
Alveolar ducts are the tiny end tubules of the branching airways that fill the lungs. Each lung holds approximately 1.5 to 2 million of them. The tubules divide into alveolar sacs at the distal end.

In human anatomy, prior to the alveolar ducts exists the terminal bronchioles.

Additional images

Enlarge picture
human alveolar duct



Bronchi, bronchial tree, and lungs


External links

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Anatomy of torso, respiratory system: Lungs and related structures
lungs
conducting zone
respiratory zone
pleurae
Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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lungs flank the heart and great vessels in the chest cavity.[1]]]

The lung is the essential respiration organ in air-breathing vertebrates, the most primitive being the lungfish.
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A respiratory bronchiole is a bronchiole at the beginning of the respiratory zone. It has cuboidal epithelia.

Additional images




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The pulmonary arteries carry blood from the heart to the lungs. They are the only arteries (other than umbilical arteries in the fetus) that carry deoxygenated blood.

In the human heart, the pulmonary trunk (pulmonary artery or main pulmonary artery
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The pulmonary veins carry oxygen-rich blood from the lungs to the left atrium of the heart. They are the only veins in the post-fetal human body that carry oxygenated (red) blood.

The pulmonary veins return the oxygenated blood from the lungs to the left atrium of the heart.
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The lymphatic system is a complex network of lymphoid organs, lymph nodes, lymph ducts, lymphatic tissues, lymph capillaries and lymph vessels that produce and transport lymph fluid from tissues to the circulatory system.
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Lymph nodes are components of the lymphatic system. They are sometimes informally called lymph glands but, as they do not secrete substances, such terminology is not entirely accurate. They are found mostly in the neck area.
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lungs flank the heart and great vessels in the chest cavity.[1]]]

The lung is the essential respiration organ in air-breathing vertebrates, the most primitive being the lungfish.
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The bronchioles are the first airway branches that no longer contain cartilage. They are branches of the bronchi, and are smaller than one millimeter in diameter.

There are no glands or cartilage in any of the bronchioles, and the epithelial cells become more cuboidal in
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Atria may refer to:
  • Atrium (heart) (plural: atria), an anatomical structure of the heart
  • Atrium (architecture) (plural: atria), a large open space within a building
  • Atria (star) or Alpha Trianguli Australis, a star in the constellation Triangulum Australe

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alveolus (plural: alveoli, from Latin alveus, "little cavity"), is an anatomical structure that has the form of a hollow cavity. Mainly found in the lung, the pulmonary alveoli
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Smooth muscle is a type of non-striated muscle, found within the "walls" of hollow organs and elsewhere like the bladder and abdominal cavity, the uterus, male and female reproductive tracts, the gastrointestinal tract, the respiratory tract, the vasculature, the skin and the
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The pulmonary arteries carry blood from the heart to the lungs. They are the only arteries (other than umbilical arteries in the fetus) that carry deoxygenated blood.

In the human heart, the pulmonary trunk (pulmonary artery or main pulmonary artery
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The pulmonary veins carry oxygen-rich blood from the lungs to the left atrium of the heart. They are the only veins in the post-fetal human body that carry oxygenated (red) blood.

The pulmonary veins return the oxygenated blood from the lungs to the left atrium of the heart.
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septum (Latin: something that encloses; plural Septa) is a partition separating two cavities or spaces. Examples include:
  • Nasal septum: the cartilage wall separating the nostrils of the human nose.

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lungs flank the heart and great vessels in the chest cavity.[1]]]

The lung is the essential respiration organ in air-breathing vertebrates, the most primitive being the lungfish.
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In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. Non-scientists often wonder why zoological and human anatomists use complex terminology to describe locations on a body, when common terms like "up",
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The bronchioles are the first airway branches that no longer contain cartilage. They are branches of the bronchi, and are smaller than one millimeter in diameter.

There are no glands or cartilage in any of the bronchioles, and the epithelial cells become more cuboidal in
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eMedicine is an online clinical medical knowledge base that was founded in 1996 by Scott Plantz and Richard Lavely, two medical doctors. It was sold to WebMD in January 2006.
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Boston University (BU) is a private research university located in Boston, Massachusetts, United States. Although chartered by the Massachusetts Legislature in 1869, Boston University traces its roots to the establishment of the Newbury Biblical Institute in Newbury,
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University of California, Davis, commonly known as UC Davis, is one of the ten campuses of the University of California, and was established as the University Farm in 1905.
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Yearbook = El Rodeo
Nickname Trojans
Men/Women of Troy
Mascot Traveler
Fight song Fight On
Athletics 19 varsity teams,
NCAA Division I
Affiliations AAU
Pac-10
Nobel laureates 1
Website www.usc.edu , www.usctrojans.
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Human anatomy is primarily the scientific study of the morphology of the adult human body.[1] It is subdivided into gross anatomy and microscopic anatomy.[1]
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Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.
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respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. A diaphragm pulls air in and pushes it out. Respiratory systems of various types are found in a wide variety of organisms.
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The human lungs are the human organs of respiration.

Humans have two lungs, with the left being divided into two lobes and the right into three lobes. Together, the lungs contain approximately 1500 miles (2,400 km) of airways and 300 to 500 million alveoli, having a total
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The human lungs are the human organs of respiration.

Humans have two lungs, with the left being divided into two lobes and the right into three lobes. Together, the lungs contain approximately 1500 miles (2,400 km) of airways and 300 to 500 million alveoli, having a total
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Right lung is divided into three lobes, superior, middle, and inferior, by two interlobular fissures:

Fissures

  • One of these, the oblique fissure, separates the inferior from the middle and superior lobes, and corresponds closely with the fissure in the left lung.

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Left lung is divided into two lobes, an upper and a lower, by the oblique fissure, which extends from the costal to the mediastinal surface of the lung both above and below the hilus.
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lingula is used to denote a projection of the upper lobe of the left lung that serves as the homologue, and some sources define this as a distinct lobe.

There are two bronchopulmonary segments of the lingula: Superior and inferior.
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