Exercise 7 Respiratory System Mechanics Video
1 www.informationsecuritysummit.org Lungs \u0026 Respiratory Tract Will Love You - Dr Alan Mandell, DC Exercise 7 Respiratory System Mechanics.
The respiratory system also respiratory apparatus, ventilatory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants.
The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs.
Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles these are called alveoli, and in birds they are known as atria. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into read article smaller tubes, the bronchioles.
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In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria Mcehanics the process of breathing which involves the muscles of respiration. In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract. The tract is divided into an upper and a lower respiratory tract.
The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds. The lower tract Fig. The branching airways of the lower tract are often described as the respiratory tree or tracheobronchial tree.
The intervals between successive branch points along the various branches of "tree" are often referred to as branching "generations", of which there are, in the adult human about The earlier generations approximately generations 0—16consisting of the trachea and the bronchi, as well Mkt 505 the larger bronchioles which simply act as air conduits, bringing air to the respiratory bronchioles, alveolar ducts and alveoli approximately generations 17—23where gas exchange takes place.
Bronchioles are defined as the small airways lacking any cartilagenous support. The first bronchi to branch from the trachea are the right and left main bronchi.]
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