Flashcards in Axial Skeleton + Body Cavities Deck (42)
Structure, movement, nutrient storage, hematopoetic blood stem cells. Calcium and phosphate.
How bones interact with each other, functional points for movement.
Skull, vertebrae, ribs
Everything you can see on the exterior (for now).
5 groups of vert. Cervical, thoracic, lumbar, sacral, coccyx. Each region has a specific number relating to somite loosely.
Thoracic and sacral/coccyx. Typhosus
Lumbar - lordosis and cervical. Curves exist for balance and creating an even weight distribution.
Columns that connect body to arch (Vertebrae)
Prevent twisting too far (protect spinal cord and spinal nerves), among others.
Created by two bones coming together (not rare, but not as common as a regular bone). Spinal nerves will exit/enter vertebral canal here.
Cervical vert. Vertebral artery and vein, plus *sympathetic nerves*
Posterior blood supply to the brain. Anterior is carotid.
Ribs are higher
posteriorly. Curved inferiorly and anteriorly. During inspiration they move superiorly and laterally.
Strong rigidity to be a protective cage while providing flexibility for breathing.
Center anterior core of intervertebral disc. Notochord gives rise to this structure.
Gives rise to vertebrae, somite differentiates into scleratome.
Know slide 9
pay attention to costal groove - allows you to tell superior to inferior (this is always inferior).
Artery, vein, nerve, muscle.
Dense fibrous connective tissue. Red lining cavity is Synovial membrane (where you find cells producing synovial fluid).
Nourish and cushion.
C1 and C2 joint. Synovial joint at dens of C2 against anterior arch of C1. This allows for head rotation.
Atlanto-occipital/lots of cervical vert
Cartilagenous solid joints
Very slight motion associated with them, if any. Often immobile.
Fibrous solid joints
Sutures (between bones of skull). Gomphosis is like this.
separates Abdominopelvic cavity and Thoracic cavity. Comes down to T12 posteriorly, anteriorly it only goes down to the sternum base.
contraction of diaphragm/relaxation of abs = inhale. Relax of diaphragm/contract abs = exhale. Thoracic and abdominopelvic cavity working together. Ribs move up and out and take sternum with it.
bony landmarks can define and distinguish the structures. Sacral/coccyx vert and lumbar vert.
Increasing intra-abdominal pressure is often referred to as the valsalva maneauver. The valsalva is accomplished by attempting to forcibly exhales against a closed airway.
intraperitoneal structures = suspended in mesenteries
retroperitoneal structures = lie between the parietal peritoneum and the abdominal wall
lines the abdominal wall
covers the suspended organs (viscera)
Packed tightly - parietal pleura, thin small barely identifiable pleural cavity between this and visceral pleura. Visceral pleura follows shape of organs. Tiny space is filled with serous fluid for reducing friction.
Fluids in body
Reducing friction or digestive process, blood, nutrient delivery.
Heart and trachea here.
Lined with meninges -3 of them. Dura, arachnoid, pia mater. Protect brain.
orbit= eye socket
middle & inner ear cavities
Anterior extent is open.