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The walls of the bladder have a series of ridges, thick mucosal folds known as rugae that allow for the expansion of the bladder. The detrusor muscle is the muscular layer of the wall made of smooth muscle fibers arranged in spiral, longitudinal, and circular bundles. [8] The detrusor muscle is able to change its length.
This tissue consists of multiple layers of epithelial cells which can contract and expand in order to adapt to the degree of distension needed. Transitional epithelium lines the organs of the urinary system and is known here as urothelium (pl.: urothelia). The bladder, for example, has a need for great distension.
Outline of human anatomy; ... This is a list of cells in humans derived from the three embryonic germ layers – ectoderm ... ureters, bladder and urethra) Prostate ...
skin - dead superficial layer: Stratified squamous, keratinized - integumentary: sweat gland ducts: Stratified cuboidal - integumentary: mesothelium of body cavities: Simple squamous: mesothelium: reproductive - female: ovaries: Simple cuboidal: germinal epithelium (female) reproductive - female: fallopian tubes: Simple columnar, ciliated ...
The ureters are 1.5–6 mm (0.06–0.24 in) in diameter [1] and surrounded by a layer of smooth muscle for 1–2 cm (0.4–0.8 in) near their ends just before they enter the bladder. [ 2 ] The ureters enter the bladder from its back surface, traveling 1.5–2 cm (0.6–0.8 in) before opening into the bladder at an angle on its outer back ...
The female urethra is located between the bladder neck to the external urethral orifice and is behind the symphysis pubis. [4] The urethral wall is composed of an inner epithelial lining, a sub-mucosa layer containing vascular supply, a thin fascial layer, and two layers of smooth muscle.
The front is known as the "vesical layer". It forms the anterior and lateral ligaments of the bladder. In males, its middle lamina crosses the floor of the pelvis between the rectum and vesiculæ seminales as the rectovesical septum; in the female this is perforated by the cervix and is named the transverse cervical ligament.
The anatomy of the human urinary system differs between males and females at the level of the urinary bladder. In males, the urethra begins at the internal urethral orifice in the trigone of the bladder, continues through the external urethral orifice, and then becomes the prostatic, membranous, bulbar, and penile urethra.