from the GNU version of the Collaborative International Dictionary of English
- adj. Surrounding the branchiæ.
- adj. Around the bronchi or bronchial tubes.
from The Century Dictionary and Cyclopedia
- Situated about the branchiæ.
Sorry, no etymologies found.
As a matter of fact, this atrium (commonly called the peribranchial cavity) is a secondary structure formed by the development of a couple of lateral mantle-folds or gill-covers (M1,
The body-cavity proper, or coeloma, which is filled with blood and encloses the hepatic gut, is very narrow in the Ascidia, as in the Amphioxus, and is here also usually confounded with the wide atrium, or peribranchial cavity, full of water.
The ejection-opening of this peribranchial cavity corresponds to the branchial pore of the Amphioxus.
The peribranchial cavity (A) is full of water, and its walls are lined with the skin-sense layer; it opens outwards in the rear through the respiratory pore (Figure 2.210 c).
In all the craniota it develops at an early stage in the horny plate; in the amphioxus it seems to be converted into a wide cavity, the atrium, or peribranchial space.