Body Wall Flashcards
Body Wall
External surface of the organism
Outer Tube, external surface not just skin, also muscle and bones
Mainly ectoderm and somatic lateral plate mesoderm
Significant blood supply
Intercostal Muscles
Occupy the intercostal spaces
External-Elevate rib
Internal- Depress Rib Cage
Innermost-
discontinuous-
Expiratory- Decrease volume of the rib cage- weak
Function: elevate and depress the ribs
Diaphram
Flat, Doam shaped muscle
Muscles of Abdominal Wall
Review Picture
External Oblique
Internal Oblique
Transversus abdominis
Rectus abdominis
Layers of Abdominal Wall
Picture
1)Skin- outermost layer and most protective
Subcutaneous Tissue
2)Camper’s Fascia- adipose CT, Fatty Tissue
3) Scarpa’s fascia membranous- areoler tissue CT
Deep:
Muscles- Can have multiple layers or just one
Transversalis fascia-situated deep to abdominal muscle
Extraperitoneal fat-variable amount
Parietal peritoneum
Vessels
Superior epigastric Vessels
Inferior epigastric Vessels
These vessels travel the body wall to get blood to the front side of the body
External Oblique
Fibers run supero-medially
Flexes and rotates the trunk; works with internal oblique
Superficial, runs up and in attacks to pelvis
Internal Oblique
Fibers run perpendicular to those of external oblique
Flexes and rotates the truck; works with external oblique
Transversus abdominis
Fibers run horizontally
No skeletal movement
horizontal orientation does not permit
flexion or lateral bending
primarily raises intra-abdominal
pressure
Keeps organs scrunched up in abdomen
maintains or increases abdomen pressure
Rectus Abdominis
paired muscles separated by
linea alba
attachments on pubic
symphysis inferiorly and xiphoid
process and costal cartilages 5-
7 superiorly
contained within rectus sheath
= fused aponeuroses of 3 flat
abdominal muscles
Linea alba and semilunar line
Linea alba dives rectus into 2 colums
Semilunar line- lateral extent of rectus abdominus
Abdominal Muscle Function
Support abdominopelvic contents.
-raise pressure, dont drop loose tore
- Protect abdominal viscera.
-separate abdomen from outside environment - Compress viscera to maintain or
increase intra-abdominal pressure
(assisting diaphragm)
–during respiration and other activities
. - Generate force necessary for
defecation, micturition, vomiting, and
parturition. - Produce anterior and lateral flexion +
rotation of the trunk; help with
posture maintenance.
-move side, forward, posture
Inguinal Canal
Passage formed in relation to gonadal descent during fetal development
Deep inguinal ring to superficial inguinal ring
Facia layer between muscles
Male Inguinal Canal
Gonads develop in dorsal body wall of lumbar region
testes pass through body wall via inguinal canal guided by the gubernaculum
Testes originated just below kidneys dragged forward during development up to body wall. Testes start posterior behind abdomen below kidneys end up in scrotum outside abdomen min in scrotum prir to birth
Female Inguinal Canal
The gubernaculum becomes round ligament of uterus and that is found in the inguinal canal
