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Related Concept Videos

Free-falling Bodies: Example01:05

Free-falling Bodies: Example

An object falling without any air resistance under the influence of gravitational force is said to be in free-fall. For free-falling bodies, the acceleration due to gravity is constant, irrespective of their mass. Free-fall is experienced not only by objects falling downward, but also by all objects whose motion is influenced by gravitational force alone. The dynamics of free-fall motion can be calculated using kinematic equations of motion, since free-fall acceleration is constant.
The...
Free-falling Bodies: Introduction01:07

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.
Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
Life Histories01:29

Life Histories

Constrained by limited energy and resources, organisms must compromise between offspring quantity and parental investment. This trade-off is represented by two primary reproductive strategies; K-strategists produce few offspring but provide substantial parental support, whereas r-strategists produce much progeny that receives little care. These strategies are related to an organism’s survival likelihood across its lifespan, which is represented by a survivorship curve. Three general types of...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Composite Bodies00:55

Composite Bodies

A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...

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Related Experiment Video

Updated: Jun 27, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
04:55

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

[Foreign body stories].

Volker Stenz1, Robert Thurnheer, Fritz Widmer

  • 1Medizinische Klinik, Kantonsspital Münsterlingen, Spital Thurgau.

Therapeutische Umschau. Revue Therapeutique
|December 3, 2008
PubMed
Summary
This summary is machine-generated.

Foreign bodies in the gastrointestinal and bronchial tracts can lead to serious complications. While many objects pass naturally, sharp or inserted items may require endoscopic or surgical removal.

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Candida albicans Biofilm Development on Medically-relevant Foreign Bodies in a Mouse Subcutaneous Model Followed by Bioluminescence Imaging
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Last Updated: Jun 27, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
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Published on: September 11, 2018

Candida albicans Biofilm Development on Medically-relevant Foreign Bodies in a Mouse Subcutaneous Model Followed by Bioluminescence Imaging
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Candida albicans Biofilm Development on Medically-relevant Foreign Bodies in a Mouse Subcutaneous Model Followed by Bioluminescence Imaging

Published on: January 27, 2015

Area of Science:

  • Medicine
  • Gastroenterology
  • Pulmonology

Background:

  • Foreign bodies in the gastrointestinal and bronchial tracts present significant clinical challenges.
  • Accidental or intentional ingestion, insertion, or aspiration of diverse objects occurs frequently in adults.
  • Conservative expulsion is common, but risks of obstruction, perforation, and penetration necessitate intervention for certain foreign bodies.

Observation:

  • Presents four distinct case studies involving foreign body incidents.
  • Includes a pen swallowed during sleep, a corncob inserted rectally, an aspirated dental bridge, and a body packer scenario.
  • Details the unique circumstances and types of foreign bodies encountered.

Findings:

  • The risk of severe complications like obstruction and perforation is directly related to the foreign body's characteristics, particularly sharp edges.
  • Endoscopic or surgical intervention is crucial for managing high-risk foreign bodies.
  • Effective management strategies depend on accurate diagnosis and prompt removal procedures.

Implications:

  • Highlights the importance of considering foreign bodies in differential diagnoses for gastrointestinal and respiratory symptoms.
  • Underscores the need for timely and appropriate endoscopic or surgical interventions to prevent morbidity.
  • Emphasizes the diverse etiologies and presentations of foreign body ingestion, insertion, and aspiration.