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Lungs, airways, blood vessels, and breathing muscles
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- The respiratory system includes a group of tissues and organs that help in breathing. This system comprises the lungs, airways, blood vessels, and breathing muscles.
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What is a human respiratory system?
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Oct 30, 2023 · The upper respiratory tract refers to the parts of the respiratory system that lie outside the thorax, more specifically above the cricoid cartilage and vocal cords. It includes the nasal cavity, paranasal sinuses, pharynx and the superior portion of the larynx.
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The continuous demands of every cell within the human body...
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The paranasal sinuses have a number of functions. The...
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- Overview
- The design of the respiratory system
human respiratory system, the system in humans that takes up oxygen and expels carbon dioxide.
The human gas-exchanging organ, the lung, is located in the thorax, where its delicate tissues are protected by the bony and muscular thoracic cage. The lung provides the tissues of the human body with a continuous flow of oxygen and clears the blood of the gaseous waste product, carbon dioxide. Atmospheric air is pumped in and out regularly through a system of pipes, called conducting airways, which join the gas-exchange region with the outside of the body. The airways can be divided into upper and lower airway systems. The transition between the two systems is located where the pathways of the respiratory and digestive systems cross, just at the top of the larynx.
The upper airway system comprises the nose and the paranasal cavities (or sinuses), the pharynx (or throat), and partly also the oral cavity, since it may be used for breathing. The lower airway system consists of the larynx, the trachea, the stem bronchi, and all the airways ramifying intensively within the lungs, such as the intrapulmonary bronchi, the bronchioles, and the alveolar ducts. For respiration, the collaboration of other organ systems is clearly essential. The diaphragm, as the main respiratory muscle, and the intercostal muscles of the chest wall play an essential role by generating, under the control of the central nervous system, the pumping action on the lung. The muscles expand and contract the internal space of the thorax, the bony framework of which is formed by the ribs and the thoracic vertebrae. The contribution of the lung and chest wall (ribs and muscles) to respiration is described below in The mechanics of breathing. The blood, as a carrier for the gases, and the circulatory system (i.e., the heart and the blood vessels) are mandatory elements of a working respiratory system (see blood; cardiovascular system).
Sep 21, 2023 · Lungs: The primary organs of the respiratory system, which house the bronchi, bronchioles, and alveoli, and facilitate gas exchange. Diaphragm : The muscular floor of the chest cavity, which plays a critical role in breathing.
The respiratory system starts at the nose and mouth and continues through the airways and the lungs. Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx.
Jan 8, 2024 · Respiratory System Parts. Your respiratory system is divided into two parts, upper and lower. Your upper respiratory tract is made up of: Nose and nasal cavity; Sinuses; Mouth;...
- Shawna Seed
Alveolar duct. Alveolus. 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.
Introduction. The Lungs and Respiratory System allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation) [1]. The respiratory system of animals is crucial for the life as it allows the exchange of gases between an organism and the environment. [2]
