Pulmonary alveolus
An alveolus (plural: alveoli, from Latin alveolus, "little cavity") is an anatomical structure that has the form of a hollow cavity. Found in the lung parenchyma, the pulmonary alveoli are the terminal ends of the respiratory tree, which outcrop from either alveolar sacs or alveolar ducts, which are both sites of gas exchange with the blood as well. Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates. The alveolar membrane is the gas-exchange surface. Carbon dioxide rich blood is pumped from the rest of the body into the alveolar blood vessels where, through diffusion, it releases its carbon dioxide and absorbs oxygen.
Structure
The alveoli are located in the respiratory zone of the lungs, at the distal termination of the alveolar ducts and atria. These air sacs are the forming and termination point of the respiratory tract. They provide total surface area of about 75 m2.
A typical pair of human lungs contain about 700 million alveoli, producing 70m2 of surface area. Each alveolus is wrapped in a fine mesh of capillaries covering about 70% of its area. An adult alveolus has an average diameter of 200 micrometres, with an increase in diameter during inhalation.
Alveolus (disambiguation)
Alveolus (pl. alveoli, adj. alveolar) is a general anatomical term for a concave cavity or pit.
Alveolus may refer to:
In anatomy and zoology in general
- Alveolar cell or pneumocyte
- Alveolar duct
- Alveolar macrophage
- Alveolar ridge, the jaw structure that contains the dental alveoli
- Alveolar canals
- Alveolar process
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The Great Manipulator
by: AllflawsFeel the lust, it's coming through, it's tearing through the skin,
You know it's there hiding, the animal within,
Feel the rage, it's coming through, it's tearing through the skin,
You know it's there hiding, the beast that's within,
Aaaaargh yes, it's the delinquent rage, trapped inside this Orwellian cage,
Aaaaargh yes, it's the restless slave, trapped inside this imperial state.
It's the covert agenda, it's the great manipulator,
It's mass indoctrination, it's the dulling of a nation
You got me where you want me, trapped inside the state machine,
You got me where you want me, trapped inside the same routine,
You got me where you want me, you got me, you got me,
In a state of apathy, in a state of apathy.
You are the prison that I can't see,
Your walls are invisible but still they hold me,
Keeping me contained, keeping me restrained,
Keeping me deluded inside the cage,
You're invisible, you're insidious, you lurk beneath the surface,
Subterranean and underground, you're so dark, you're profound.
You got me where you want me, trapped inside the state machine,
You got me where you want me, trapped inside the same routine,
You got me where you want me, you got me, you got me,
In a state of apathy, in a state of apathy.
Hey, oppressor, you've done so well, keeping blind for so many years,
Keeping me ignorant, keeping me dumb, apathetic, detached and numb,
But now I can see your insidious monopoly, and how you shape my reality,
Coz the more I learn you, the more I oppose you,
The more I understand you, the more I hate you.
Now, now's the time to change,
Now, now I see your games,
Now, now's the time to change,
Now, now I see you.
You tell us that we're free in our state of apathy,
You tell us that we're free in our numb reality,
You tell us that we're free in our state of apathy,
You tell us that we're free but is it just a fallacy.
You got me where you want me, trapped inside the state machine,
You got me where you want me, trapped inside the same routine,
You got me where you want me, you got me, you got me,