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Related Concept Videos

Anatomy of Respiratory System II: Lower Respiratory Tract01:31

Anatomy of Respiratory System II: Lower Respiratory Tract

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The lower respiratory tract is anatomically composed of several vital structures, including the larynx, trachea, bronchial tree, alveoli, lungs, and pleurae. Each component has a specific function, and all are intricately connected to ensure efficient respiration.
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The respiratory system is comprised of the organs that enable breathing. Air enters the nostrils and mouth, followed by the pharynx (throat) and larynx (voice box), which lead to the trachea (windpipe). In the thoracic cavity, the trachea splits into two bronchi that allow air to enter the lungs. The bronchi split into progressively smaller bronchioles and terminate in small groups of tiny sacs in the lungs called alveoli, where gas exchange occurs.
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Anatomy of Respiratory System I: Upper Respiratory Tract01:29

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The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
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Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
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Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
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Overview of Respiratory System01:23

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The respiratory system is a complex biological apparatus that facilitates the exchange of gases, specifically oxygen and carbon dioxide, between our bodies and the environment. This system plays a vital role in the physiological process of respiration, an essential function for sustaining life.
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Related Experiment Video

Updated: Feb 10, 2026

Organotypic Cultures of Adult Human Cortex as an Ex vivo Model for Human Stem Cell Transplantation and Validation
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Human Organotypic Respiratory Models.

Mattias Svensson1, Puran Chen2

  • 1F59, Department of Medicine, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, 141 86, Stockholm, Sweden. mattias.svensson@ki.se.

Current Topics in Microbiology and Immunology
|May 30, 2018
PubMed
Summary
This summary is machine-generated.

Researchers are developing advanced in vitro models of human lung tissue to study respiratory diseases. These organotypic models mimic real tissue, aiding in understanding lung development, inflammation, and drug discovery for respiratory conditions.

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Area of Science:

  • Biomedical engineering
  • Respiratory medicine
  • Cell biology

Background:

  • Understanding human lung development, homeostasis, and disease requires accurate in vitro models.
  • Current research focuses on developing organotypic models that mimic human respiratory tissues.
  • These models aim to bridge the gap between simple cell cultures and complex in vivo systems.

Purpose of the Study:

  • To present various in vitro organotypic model systems for human respiratory tissues.
  • To highlight the incorporation of diverse cell types and extracellular matrix components.
  • To demonstrate the integration of human innate immune cells for studying inflammation.

Main Methods:

  • Review of existing organotypic respiratory model systems.
  • Description of models incorporating specific cell types and extracellular matrix.
  • Methodology for combining models with human innate immune cells.

Main Results:

  • Examples of model systems from unicellular to multicellular complexity are provided.
  • Models vary in their recapitulation of native tissue cell types and extracellular matrix.
  • Integration with immune cells enhances the modeling of tissue inflammation.

Conclusions:

  • Organotypic respiratory models offer valuable insights into lung physiology and disease.
  • These models serve as a platform for investigating tissue infection and inflammation.
  • They facilitate the identification of novel therapeutic targets and drug screening for lung disorders.