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Related Concept Videos

Internal Energy02:00

Internal Energy

36.6K
The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial.
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Internal Energy01:29

Internal Energy

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The internal energy of a thermodynamic system is the sum of the kinetic and potential energies of all the molecules or entities in the system. The kinetic energy of an individual molecule includes contributions due to its rotation and vibration, as well as its translational energy. The potential energy is associated only with the interactions between one molecule and the other molecules of the system. Neither the system's location nor its motion is of any consequence as far as the internal...
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Internal Receptors01:31

Internal Receptors

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Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
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International System of Units01:29

International System of Units

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The International System of Units, known as the SI system, is a universally accepted measurement system recognized and used worldwide. The SI system is based on a set of three base units considered absolute, and their values do not change with location. These base units are meters, kilograms, and seconds.
Prefixes are used to define both larger and smaller quantities in the SI system. For example, milli, micro, and nano define smaller quantities, while kilo, mega, and giga are used to define...
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External and Internal Respiration01:24

External and Internal Respiration

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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...
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The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
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Related Experiment Video

Updated: Jan 24, 2026

Application of a New Mesh Fixation Method in Laparoscopic Incisional Hernia Repair
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Internal hernia in adults

A Ozenç1, A Ozdemir, T Coskun

  • 1Department of Surgery, Hacettepe University School of Medicine, Ankara, Türkiye (Turkey).

International Surgery
|December 16, 1998
PubMed
Summary

Early surgical intervention is crucial for reducing complications in acute intestinal obstruction cases caused by internal herniation. Prompt diagnosis and treatment significantly improve patient outcomes and shorten hospital stays.

Area of Science:

  • Gastroenterology
  • Surgical Pathology
  • Abdominal Surgery

Background:

  • Internal herniation is often caused by congenital anomalies or acquired defects of the mesentery and omentum.
  • These conditions predispose individuals to internal herniation, a significant cause of acute intestinal obstruction.

Purpose of the Study:

  • To investigate factors influencing prognosis in patients with internal herniation.
  • To evaluate the relationship between clinical presentation, surgical findings, and patient outcomes.

Main Methods:

  • Retrospective review of 609 patients undergoing laparotomy for acute intestinal obstruction.
  • Detailed analysis of 18 cases identified as internal herniation, focusing on clinical, radiological, and surgical data.

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Main Results:

  • Bowel strangulation was associated with increased postoperative complications (p=0.045).
  • Patients with strangulation experienced longer delays between symptom onset and surgery (p=0.046).
  • Shorter postoperative hospital stays were observed in patients without strangulation (p=0.03).

Conclusions:

  • Preoperative diagnosis of internal herniation is challenging due to nonspecific signs and symptoms.
  • Early surgical intervention is essential to minimize postoperative complications in acute intestinal obstruction.