Air enters the respiratory tract through the nostrils. The surface of the nasal cavities is moist from mucus and warm from blood flowing just under it, so as air passes through this area it is humidified and warmed. Nerve endings responsible for smell are located in the nasal mucosa. A. Structure 1.
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The respiratory system provides oxygen to the body’s cells while removing carbon dioxide, a waste product that can be lethal if allowed to accumulate. There are 3 major parts of the respiratory system: the airway, the lungs, and the muscles of respiration. The airway, which includes the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles, carries air between the lungs and the body’s exterior. The lungs... Click to read more below. The cells of the human body require a constant stream of oxygen to stay alive.
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Air is not only filtered, but is also moistened and warmed before entering the lungs. The organs of the respiratory system are designed to perform two basic functions: (1) they serve as an air distributor, and (2) they serve as a gas exchanger for the body.
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The airways are pipes that carry oxygen-rich air to your lungs. They also carry carbon dioxide, a waste gas, out of your lungs. The airways include your: 1  Nose and linked air passages (called nasal cavities). 2  Mouth. 3  Larynx (LAR-ingks), or voice box. 4  Trachea (TRA-ke-ah), or windpipe. 5  Tubes called bronchial tubes or bronchi, and their branches.
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PHARYNX. Air and food pass through the pharynx or throat on their way to the lungs and stomach, respectively. Two small masses of lymphatic tissue called tonsils are embedded in the mucous membrane of the pharynx. A. Structure 1. Pharynx (throat) about 12.5 cm (5 inches) long 2.
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The respiratory system does this through ventilation, gas exchange between alveoli and capillaries, transportation of oxygen from the lungs to the cells; gas exchange between cells and capillaries and delivery of carbon dioxide from the cells to the lungs.
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Pulmonary ventilation is the process of moving air into and out of the lungs to facilitate gas exchange. The respiratory system uses both a negative pressure system and the contraction of muscles to achieve pulmonary ventilation.
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The passageway that carries air from nose to the alveoli and from alveoli to the nose makes up the respiratory tract. The respiratory tract is divided into upper (nose, nasal cavity, sinuses and pharynx) and lower (larynx, trachea, bronchi, bronchiole, and alveoli) respiratory system.
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These subdivisions of the trachea lead to the lungs. In each lung they branch into smaller, or secondary, bronchi, which branch into bronchioles. Bronchioles subdivide into microscopic tubes called alveolar ducts. Each alveolar duct ends in several grapelike clusters called alveolar sacs.
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Air first enters your body through your nose or mouth, which wets and warms the air. (Cold, dry air can irritate your lungs.) The air then travels through your voice box and down your windpipe. The windpipe splits into two bronchial tubes that enter your lungs.
https://www.nhlbi.nih.gov/health/health-topics/topics/hlw/system
which structure in the respiratory system is responsible for transporting air from the trachea to the lungs?
Alveolar ducts structure in the respiratory system is responsible for transporting air from the trachea to the lungs. Alveolar duct is a structure in the respiratory system which is responsible for transporting air from the trachea to the lungs.  