👉 Pleurobranchia, also known as pleural pleura, is a type of lung tissue that is found in the pleura, or sac-like layer that surrounds the lungs. In humans, pleura contains an array of small air-filled spaces called pleural cavities. These chambers are lined with thin, smooth, muscular layers called pleurae. Pleurae contain blood vessels and other structures that help to support the pleura. Pleurobranchia is a type of ple