| 释义 |
air bladder
air bladdern.1. See swim bladder.2. See float.air bladder n 1. (Zoology) ichthyol Also called: swim bladder an air-filled sac, lying above the alimentary canal in bony fishes, that regulates buoyancy at different depths by a variation in the pressure of the air 2. (Botany) any air-filled sac, such as one of the bladders of seaweeds air′ blad`der
n. 1. a vesicle or sac containing air. 2. an air-filled sac at the top of the body cavity in bony fishes, serving in most to regulate hydrostatic pressure. Also called swim bladder. [1725–35] air bladder An air-filled sac in many fish that helps maintain buoyancy or, in some species, helps in respiration, sound production, or hearing. Also called swim bladder. See float.Thesaurus| Noun | 1. |  air bladder - an air-filled sac near the spinal column in many fishes that helps maintain buoyancyswim bladder, floatsac - a structure resembling a bag in an animal |
air bladder
air bladder, in fish: see swim bladderswim bladder,
large, thin-walled sac in some fishes that may function in several ways, e.g., as a buoyant float, a sound producer and receptor, and a respiratory organ. The swim bladder, or air bladder, is located in the dorsal portion of the body cavity and is filled with gases.
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air blad·dera gas-filled sac that is present in most fish and functions as a hydrostatic organ; it is located beneath the vertebral column primarily in the anterior abdomen and is connected with the esophagus in some species (for example, goldfish). Oxygen is transferred from a rich venous sinus into the swim bladder to increase buoyancy. Synonym(s): swim bladderair bladdern.1. See swim bladder.2. See float.air bladder
Related to air bladder: air vesiclesSynonyms for air bladdernoun an air-filled sac near the spinal column in many fishes that helps maintain buoyancySynonymsRelated Words |