During inspiration, fresh air enters the respiratory system through the pared external nares (nostrils; shown here) and/or the oral cavity to the pharynx. Air then travels through the glottis into the trachea, through the bronchi and bronchioles to reach the alveoli.
- 1 Which is the correct order of structures through which gas air passes during inspiration?
- 2 What structures does air pass through during inhalation?
- 3 What are the structures that air passes through?
- 4 What is the order of inspiration?
- 5 What is the correct sequence of structures through which air passes through on the way into the mammalian lung?
- 6 What happens during inspiration?
- 7 How is air drawn into the lungs during inspiration?
- 8 What is the function of inspiration?
- 9 Which statement correctly describes what happens during inspiration?
- 10 How air passes through the respiratory system step by step?
- 11 What pathway does air travel through the respiratory system?
- 12 What are the parts of inspiration?
- 13 What are the steps for inspiration?
- 14 What structures are responsible for breathing process?
Which is the correct order of structures through which gas air passes during inspiration?
The flow of air from the environment moves through the respiratory system in these sequential steps during inspiration: Nose or mouth > pharynx > larynx > trachea > the right or left bronchi of the lung > bronchioles of the lungs > alveoli of the lungs.
What structures does air pass through during inhalation?
When you inhale through your nose or mouth, air travels down the pharynx (back of the throat), passes through your larynx (voice box) and into your trachea (windpipe). Your trachea is divided into 2 air passages called bronchial tubes. One bronchial tube leads to the left lung, the other to the right lung.
What are the structures that air passes through?
Air passage way consists of nostrils, nasal cavities, pharynx, larynx, trachea, bronchi and bronchioles (present in lungs).
What is the order of inspiration?
Inspiratory muscles contract (diaphragm descends; rib cage rises). Thoracic cavity volume increases. Lungs are stretched;intrapulmonary volume increases.
What is the correct sequence of structures through which air passes through on the way into the mammalian lung?
In mammals, air is warmed and humidified in the nasal cavity. Air then travels down the pharynx and larynx, through the trachea, and into the lungs. In the lungs, air passes through the branching bronchi, reaching the respiratory bronchioles.
What happens during inspiration?
The first phase is called inspiration, or inhaling. When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside.
How is air drawn into the lungs during inspiration?
During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs.
What is the function of inspiration?
Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction. During inspiration, the diaphragm contracts and the thoracic cavity increases in volume. This decreases the intraalveolar pressure so that air flows into the lungs.
Which statement correctly describes what happens during inspiration?
Which statement correctly describes what happens during inspiration? The external intercostal, pectoralis minor, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
How air passes through the respiratory system step by step?
Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx. The entrance to the larynx is covered by a small flap of tissue (epiglottis) that automatically closes during swallowing, thus preventing food or drink from entering the airways.
What pathway does air travel through the respiratory system?
Respiratory System: Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)
What are the parts of inspiration?
- Scalenes – elevates the upper ribs.
- Sternocleidomastoid – elevates the sternum.
- Pectoralis major and minor – pulls ribs outwards.
- Serratus anterior – elevates the ribs (when the scapulae are fixed).
- Latissimus dorsi – elevates the lower ribs.
What are the steps for inspiration?
Terms in this set (10)
- inspiration 1. inspiratory muscles contract.
- inspiration 2. thoracic cavity volume increases.
- inspiration 3. lungs are stretched.
- inspiration 4. intrapulmonary pressure drops.
- inspiration 5. air flows into lungs down pressure gradient until pulmonary pressure is 0.
- expiration 1.
- expiration 2.
- expiration 3.
What structures are responsible for breathing process?
Respiratory muscles The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles.