A pneumatocyst is a large float containing gas found in brown algae. The Phaeophyceae or brown algae, (singular alga is a large group of mostly marine multicellular Algae including many Seaweeds of colder An organism may have more than one. They provide buoyancy to lift the blades toward the surface, allowing them to receive more sunlight for photosynthesis. In Physics, buoyancy ( BrE IPA: /ˈbɔɪənsi/ is the upward Force on an object produced by the surrounding liquid or gas in which it is Photosynthesis is a Metabolic pathway that converts Light Energy into Chemical energy.
The proportion of gases in the pneumatocysts adjusts by equilibrating with the surrounding air or water. The pneumatocyst can hold O2, CO2 and CO. Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the Carbon dioxide ( Chemical formula:) is a Chemical compound composed of two Oxygen Atoms covalently bonded to a single Carbon monoxide, with the chemical formula CO is a colorless odorless tasteless yet highly toxic Gas.
A pneumatocyst can also be an air bladder in the lungs which generally appears after a pulmonary trauma. These also go by the name of traumatic pneumatoceles.