Urinary bladder an organ that regularly stores a hyperosmotic concentration of urine. It therefore is relatively impermeable and has multiple epithelial layers. The urinary bladder of the cetaceans (whales and dolphins) is proportionally smaller than that of land-dwelling mammals. In the whole class of Aves there is no urinary bladder per se. Although all birds have kidneys, the ureters open directly into a cloaca which serves as a reservoir for urine, fecal matter, and eggs. In crustaceans, the urinary bladder consists of two sets of lateral and central lobes. Urinary bladder The urinary bladder is a hollow muscular organ in humans and
American Kidney Fund kidney disease. In 2016, AKF held Kidney Action Day events in Alabama (Bessemer), Chicago, Houston, New Orleans, Philadelphia, and Washington, D.C. The organization's public health education initiatives provide valuable information to patients and caregivers about all aspects of kidney disease and treatment, along with material on how kidney disease can be prevented. Through extensive online information, downloadable fact sheets and tools, a free monthly webinar series, a toll-free health information HelpLine for the public (866-300-2900), and a Kidney Health Educator program, AKF helps people understand their risk for kidney disease and what they can do to prevent it. The American