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Pneumatocyst
 
 
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In phytology, a pneumatocyst is a large float containing gas found in brown algae
Brown algae

The Phaeophyceae or brown algae, is a large group of mostly Ocean multicellular algae, including many seaweeds of colder Northern Hemisphere waters....
. An organism may have more than one. They provide buoyancy
Buoyancy

In physics, buoyancy is the upward force that keeps things afloat. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body....
 to lift the blades toward the surface, allowing them to receive more sunlight for photosynthesis
Photosynthesis

File:Seawifs global biosphere.jpgPhotosynthesis is a metabolic pathway that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight....
.

The proportion of gases in the pneumatocysts adjusts by equilibrating with the surrounding air or water.






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Giantkelp2 300
In phytology, a pneumatocyst is a large float containing gas found in brown algae
Brown algae

The Phaeophyceae or brown algae, is a large group of mostly Ocean multicellular algae, including many seaweeds of colder Northern Hemisphere waters....
. An organism may have more than one. They provide buoyancy
Buoyancy

In physics, buoyancy is the upward force that keeps things afloat. The net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body....
 to lift the blades toward the surface, allowing them to receive more sunlight for photosynthesis
Photosynthesis

File:Seawifs global biosphere.jpgPhotosynthesis is a metabolic pathway that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight....
.

The proportion of gases in the pneumatocysts adjusts by equilibrating with the surrounding air or water. The pneumatocyst can hold O2
Oxygen

Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...
, CO2
Carbon dioxide

Carbon dioxide is a chemical compound composed of two oxygen atoms covalent bond to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state....
 and CO
Carbon monoxide

Carbon monoxide, with the chemical formula CO, is a colorless and odorless, tasteless, yet highly toxic gas. Its molecules consist of one carbon atom covalent bond to one oxygen atom....
.