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Urinary Bladder

Urinary Bladder

The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...

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Related Experiment Video

Updated: May 13, 2026

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models

Published on: August 9, 2012

Swim bladder-derived biomaterials: structures, compositions, properties, modifications, and biomedical applications.

Xiaorong Lan^1,2,3,4, Mingdong Luo^1,4, Meiling Li⁵

¹Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, The Affiliated Stomatological Hospital, Southwest Medical University, Luzhou, 646000, China.

Journal of Nanobiotechnology

|April 17, 2024

Summary

Fish swim bladders offer a promising alternative to mammalian biomaterials, reducing infection risks. This review explores their composition, properties, and diverse biomedical applications for regenerative medicine.

Keywords:

Biological adhesive Cardiovascular repair Hydrogel Swim bladder Tissue repair

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Area of Science:

Biomaterials Science
Regenerative Medicine
Tissue Engineering

Background:

Animal-derived biomaterials are widely used but carry infection risks.
Non-mammalian biomaterials are being explored as safer alternatives.
Fish swim bladders are rich in collagen, elastin, and polysaccharides.

Purpose of the Study:

To review the structure, composition, properties, and modifications of fish swim bladders.
To comprehensively discuss the direct and indirect biomedical applications of swim bladder biomaterials.
To provide insights and directions for future research in this field.

Main Methods:

Literature review of existing research on fish swim bladders in biomedicine.
Analysis of swim bladder composition (collagen, elastin, polysaccharides).
Categorization of direct and indirect biomedical applications.

Main Results:

Swim bladders possess favorable biomaterial properties due to their composition.
Direct applications include soft tissue, dural, and cardiovascular repair.
Indirect applications involve collagen peptides, hydrogels, and biological adhesives.

Conclusions:

Fish swim bladders are a valuable, safe, and versatile biomaterial source.
Their applications span tissue repair, drug delivery, and regenerative medicine.
Further research can optimize swim bladder utilization in advanced biomedical fields.