Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
Gut muscularis externa
|
Inner circular
Outer longitudinal |
|
|
Urinary muscularis externa
|
Inner longitudinal
Middle circular Outer longitudinal |
|
|
Bladder muscularis externa
|
Inner longitudinal
Middle circular Outer longitudinal |
|
|
Detrusor muscle function and composition
|
Contract upon urination to squeeze out urine.
Composed of three smooth muscle (muscularis externa) layers that converge at neck of bladder. |
|
|
Urinary internal sphincter function and composition
|
Primary muscle for inhibiting urine release.
Formed as a continuation of detruso muscle. |
|
|
Urinary external sphincter (sphincter urethrae) function and composition
|
Secondary sphincter to control urine control.
Composed of skeletal muscle. |
|
|
Control of urinary system
|
Detrusor and internal sphincter: autonomic (involuntary) control
External sphincter: somatic (voluntary) control External sphincter can override autonomically driven internal sphincter and detrusor muscle |
|
|
Innervation of urinary system
|
Internal sphincter: ANS (beta receptor relaxes muscle as bladder fills, alpha receptor contracts and bladder empties)
External sphincter: pudendal nerve |
|
|
Urethra epithelium
|
Transition: transitional (urinary) epithelium --> non-keratinized stratified squamous
|
|
|
Glands of Littre
|
Found in male urethra; lubricate mucosal surface of urethra.
|
|
|
Parts of the male urethra
|
1. Prostatic urethra
2. Membranous urethra 3. Penile urethra 4. Spongy urethra |
|
|
Epithelium of male urethra
|
1. Prostatic urethra - transitional epithelium
2. membranous urethra - begins transition to stratified or psuedostratified columnar 3. penile urethra - stratified or pseudostratified columnar 4. spongy urethra - non-keratinized stratified squamous |
