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Related Concept Videos

Gas Exchange and Transport01:20

Gas Exchange and Transport

Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
Respiration and Gaseous Exchange01:20

Respiration and Gaseous Exchange

The intricate interplay between the cardiovascular and respiratory systems is crucial for efficiently transporting respiratory gases throughout the body. Let us explore the cardiovascular system's multifaceted functions, emphasizing its pivotal role in gas exchange.
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves the...
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 pressure exerted by...
The Carbon Cycle01:14

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
Gas Solubility01:31

Gas Solubility

Gas solubility in liquids forms liquid-gas solutions, such as soft drinks, where carbon dioxide is dissolved in water, and the ocean, where the solubility of oxygen and carbon dioxide supports marine life. The ability of oceans to dissolve gases impacts weather conditions in the troposphere.However, gas-liquid interactions vary. For instance, hydrogen chloride gas is highly soluble in water, while oxygen's solubility is much lower. Because these solutions are non-ideal, Raoult’s law, which...
The Sulfur Cycle01:22

The Sulfur Cycle

Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...

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Related Experiment Video

Updated: May 20, 2026

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
10:11

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

Ocean-atmosphere trace gas exchange.

Lucy J Carpenter1, Stephen D Archer, Rachael Beale

  • 1Department of Chemistry, University of York, York, N.Yorks. lucy.carpenter@york.ac.uk

Chemical Society Reviews
|July 24, 2012
PubMed
Summary
This summary is machine-generated.

Marine emissions of sulfur, nitrogen, and halogen gases significantly impact global biogeochemical cycles and atmospheric processes. This review details controls on these sea-air emissions, including dimethyl sulfide (DMS) and halocarbons.

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Area of Science:

  • Ocean-atmosphere interactions
  • Atmospheric chemistry
  • Biogeochemical cycles

Background:

  • Oceans are major sources of volatile gases crucial for atmospheric processes.
  • These emissions influence marine aerosol formation, ozone levels, and radiative budget.
  • Key gases include sulfur, nitrogen, and halogen compounds.

Purpose of the Study:

  • To review physical, chemical, and biological controls on sea-air gas emissions.
  • To summarize global emission budgets and formation/loss mechanisms for key marine gases.
  • To cover gases like dimethyl sulfide (DMS), halocarbons, and nitrogen compounds.

Main Methods:

  • Literature review of existing studies on marine gas emissions.
  • Analysis of physical, chemical, and biological factors influencing emissions.
  • Compilation of data on global emission budgets and oceanic processes.

Main Results:

  • Oceans emit significant quantities of sulfur, nitrogen, and halogen gases.
  • These emissions affect atmospheric chemistry, aerosol formation, and climate.
  • Identified key gases include DMS, halocarbons, NH(3), N(2)O, CH(4), and CO.

Conclusions:

  • Marine gas emissions are critical to atmospheric composition and function.
  • Understanding emission controls is vital for climate and air quality research.
  • Further research on formation and loss mechanisms is needed.