A&P 1.20 Flashcards
External obliques
A, I, O
A: unilateral: lateral flex vertebral column to the same side; rotate vertebral column to the opposite side
Bilaterally: flex the vertebral column
I: anterior part of the iliac crest, abdominal aponeurosis to linea alba, inguinal ligament
O: external surfaces of 5th to 12th ribs
Named for location: external and direction of fibers: oblique
Inguinal ligament
Goes from ASIS to the pubis
Linea alba
From xipoid process to the pubic symphysis and crest
Fibrous network description
Continuous, three dimensional interpenetrating web
From dermis through superficial and deep fascia to the various mysiums and from those through tendons to periosteum, ligaments, bone and joint capsules
Membranes
Defined
Thin sheets that cover or line parts of the body
Two types of membranes
Epithelial
Connective
Epithelial membranes
3
Cutaneous membranes
Mucous membranes
Serous membranes
Epithelial membranes
Defined
Avascular layer of epithelium and a basement membrane of fibrous connective tissue
Cutaneous membrane
Skin
Covers the surface of the body
Specialized membrane that covers our entire body
Mucous membrane
Lines cavities that open to the external surface of the body
GI, respiratory, reproductive tracts
Serous membranes
Lines closed cavities within the ventral body cavity and line the organs within those cavities
Connective tissue membranes
Synovial
Meninges
Connective tissue membranes
2
No epithelial tissue; just connective tissue
Synovial
Meninges
Synovial membranes
Described
A layer of areolar connective tissue only, no epithelial layer
There are specialized cells within the areolar tissue in synovial membranes
contains no epithelium
Meninges
Define
Specific to nervous system
Are the membranes covering the brain and spinal cord
Serous membranes
2 layers
Parietal layer
Visceral layer
Space
Parietal layer
Outer layer that lines the “wall” of the cavity
Visceral layer
Inner layer that surrounds the “organs”
Space
Small potential space filled with serous fluid
Allows the organs to glide easily against each other and the walls of their cavity
3 serous membranes
Pericardium
Pleura
Peritoneum