What are the 12 structures of the respiratory system?
These are the parts:
- Nose.
- Mouth.
- Throat (pharynx)
- Voice box (larynx)
- Windpipe (trachea)
- Large airways (bronchi)
- Small airways (bronchioles)
- Lungs.
What are the 4 Respiratory zone structures?
Such structures include the nasal cavity, pharynx, larynx, trachea, and most of the bronchial tree. The respiratory zone includes all the organs and structures that are directly involved in gas exchange, including the respiratory bronchioles, alveolar ducts, and alveoli.
What is the structure of the respiratory?
The respiratory system consists of all the organs involved in breathing. These include the nose, pharynx, larynx, trachea, bronchi and lungs.
What happens in the canalicular stage?
The canalicular stage takes place between the 16th and 25th week. At this time the gas exchanging portion of the lung is formed and vascularized. There is a decrease of interstitial tissue and growth of the capillary network. By 20 weeks there is differentiation of the type I pneumocyte.
What is the muscular sheet below the lungs called?
The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.
Where are Generation 0 16 & 17 located and what are their functions?
9.1. Regarding physiological functions, the contiguous airway from the trachea to the terminal bronchioles (generation index 0–16) is called the conducting zone, and the area from the respiratory bronchioles to the alveolar sacs (generation index 17–23) is called the transitional and respiratory zone.
What are the 3 main structures of the respiratory system?
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.
What are the structures of the respiratory system and their functions?
Pharynx (throat): Tube that delivers air from your mouth and nose to the trachea (windpipe). Trachea: Passage connecting your throat and lungs. Bronchial tubes: Tubes at the bottom of your windpipe that connect into each lung. Lungs: Two organs that remove oxygen from the air and pass it into your blood.
What is the structure of the laryngopharynx?
The laryngopharynx includes three major sites: the pyriform sinus, postcricoid area, and the posterior pharyngeal wall. Like the oropharynx above it, the laryngopharynx serves as a passageway for food and air and is lined with a stratified squamous epithelium. It is innervated by the pharyngeal plexus.
How is the respiratory tract characterized in H / E staining?
In H/E staining, goblet cells are characterized by lighter colored cytoplasm filled with poorly stained, basophilic (pink) mucus. The respiratory epithelium changes as it descends down the respiratory tract.
Which is the middle section of the respiratory system?
The Respiratory System. The respiratory airways are the middle section and include the larynx, the trachea, the bronchi and the bronchioles. Lastly, the lower section of the respiratory tract are the lungs themselves which are comprised of the respiratory bronchioles, the alveolar ducts, the alveolar sacs and the alveoli.
What makes up the ciliated epithelium of the respiratory system?
The ciliated epithelium is a part of the filtration mechanism for air before it gets to the deepest portions of the lungs. The respiratory epithelium is primarily composed of ciliated columnar epithelial cells and interspersed with a number of goblet cells (Figure 2).
What is the structure of the respiratory membrane?
The respiratory membrane consists of the alveolar and capillary walls. Gas exchange occurs across this membrane. Characteristics of this membrane follow: Type I cells are thin, squamous epithelial cells that constitute the primary cell type of the alveolar wall.