Lectures 31-32 Skeletal System Flashcards
Appendicular skeleton includes
-limbs
-girdles
Axial skeleton includes (3)
-vertebrae
-ribs
-sternum
There are over __ bones in most mammals
200
Components of the musculoskeletal system (5)
-bones
-joints
-muscles (skeletal)
-nerves
-blood vessels
Majority of bones are in the
Feet
Bones of the limbs and girdles are part of the
Appendicular skeleton system
Vertebrae, ribs and sternum are part of the
Axial skeletal system
Cranial means
Skull (head)
Vertebral column is comprised of
-cervical (C)
-thoracic (T)
-lumbar (L)
-sacral (S)
-caudal (Ca)
There are always __ in the cervix
7
Spinal cord passes through
Vertebral foramen
Typical vertebra consists of (4)
-body/centum
-neural arch (laminate and pedicel)
-processes (articular, spinous, and transverse)
-articular surfaces
There are always seven ____ vertebra
Cervical
First two cervical vertebrae are
-atlas
-axis
The atlas and axis are
The first two specialized cervical vertebra
The atlas (3)
-Holds up the head
-small and irregular
-large wings
What is cranial to the axis
Atlas
What is caudal to the atlas
Axis
The axis
-is caudal to the atlas
-C2
-has large spinous processes
The atlas lacks
Spinal processes
Thoracic vertebra (2)
-are the attachment sites to the ribs
-have tall spinous processes
Lumbar vertebra (2)
-have large, forward transverse processes
-are “locked” together for less movement
Sacrum (2)
-fusion of 3 vertebrae that articulate with pelvis
-have no movement
Horses/cattle have ___ sacral vertebrae
5 (increased # with increased size)
Fusion of the sacral vertebrae is for
Absorption of force during locomotion
Caudal/Coccygeal vertebrae (5)
-vary between and within species (tail)
-are long and narrow
-have small processes
-are mobile
-posses hemal arches and processes
Ribs consist of (3)
-sternal (true)
-asternal (false)
-floating
Ribs consist of
-sternal (true)
-asternal (false)
-floating
Asternal ribs
Have an indirect attachment to the sternum
Floating ribs
Have no connection to ribs, but connect to vertebral column
Sternum consists of (3)
-manubrium (most cranial)
-sternebra
-xiphoid cartilage (most caudal)
Costochondrial junction
Links costal cartilage to bone of ribs
Costochondrial junction means
Costo = ribs
Chondrial = cartilage
The knee is the
Stifle
The heel of your foot is
Tarsus/hock
Three phalanges
-proximal
-middle
-distal
Digit one lacks
Middle phalange
The most medial digit is
Digit I
The most lateral digit is
Digit V
The horse’s pentadactyl limb (2)
-has a fused radius/ulna
-moves on the fingernail of the middle finger
The thoracic/pectoral girdle is
The scapula
Scapula includes (4)
-clavicle
-supraglenoid tubercle
-spine
-glenoid cavity
The glenoid cavity of the scapula
Articulates with the shoulder
The spine of the scapula
Increases surface area for muscle attachment