A&P Lab Quiz#4
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What is the linea alba?
- - a band of tough connective tissue in the midline of the anterior abdominal wall
- - it serves as a muscle attachment
What is the rectus abdominus?
a muscle that spans from the ribs and sternum to the pubic bones
What is the transversus abdominis?
this muscle forms the third layer (deepest layer) of the abdominal wall muscles
What is the action of the external oblique muscle?
to tense the abdomonial wall and compress abdominal contents
What is the action of the rectus abdominis?
to tense the abdominal wall and compress abdominal contents and flex the vertebral column
What muscles together form the erector spine group?
- - the three deep back muscle groups...
- - the iliocostalis, longissimus, spinalis
What forms the pelvic diaphram?
the levator ani and coccygeus
The levator ani provides a sphincterlike action in the what?
in the anal canal and vagina
What is the action of the coccygeus?
to support pelvic viscera and and provide sphincterlike action in the anal canal and vagina
What surrounds the base of the penis?
In femals what does the bulbospongiosus act to do?
it acts to constrict the vagina and assist in erection of clitoris
The ischiocavernosus extends from where to where?
it extends from the margin of the pubic arch to the ischial tuberosisty
In females, the levator ani muscles are separated by what?
they are seperated by the vagina, urethra, and anal canal
What is the action of the superficial transversus perinei?
to support pelvic viscera
The coccygeus extends from where to where?
it extends from the coccyx and sacrum to the ischial spine
What does the spincter urethrae assist in?
it assists in closing the urethra
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