Related Experiment Video

Updated: Nov 24, 2025

Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models
07:56

Evaluating Regional Pulmonary Deposition using Patient-Specific 3D Printed Lung Models

Published on: November 11, 2020

4.6K

Effects of space sizes on the dispersion of cough-generated droplets from a walking person

Zhaobin Li, Hongping Wang, Xinlei Zhang

    Physics of Fluids (Woodbury, N.Y. : 1994)
    |December 28, 2020
    PubMed

    More Related Videos

    Dry Powder and Nebulized Aerosol Inhalation of Pharmaceuticals Delivered to Mice Using a Nose-only Exposure System07:28

    Dry Powder and Nebulized Aerosol Inhalation of Pharmaceuticals Delivered to Mice Using a Nose-only Exposure System

    Published on: April 6, 2017

    41.1K
    Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction08:14

    Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction

    Published on: September 16, 2016

    17.4K

    Related Concept Videos

    Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

    Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

    Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
    30.5K
    External and Internal Respiration01:24

    External and Internal Respiration

    External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...
    6.3K
    Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

    Factors Affecting Dissolution: Particle Size and Effective Surface Area

    Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
    1.4K
    Physical Principles Governing Gas Exchange01:16

    Physical Principles Governing Gas Exchange

    Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
    Gas Laws Governing Respiration
    The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
    Dalton's Law asserts that the total...
    2.8K
    Factors Affecting Pulmonary Ventilation01:19

    Factors Affecting Pulmonary Ventilation

    Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
    Alveolar Surface Tension
    The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
    2.3K
    Van der Waals Interactions01:24

    Van der Waals Interactions

    Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
    68.8K