ch 7 - muscular system - lab book Flashcards
What are the 3 different types of muscles that make up the muscular system?
Skeletal muscle
Cardiac muscle
Smooth muscle
Skeletal muscles can be divided into two major groups. What are those that attach a limb to the body…? And what are those that attach to bones within the limb itself?
extrinsic muscles and intrinsic muscles
What are tendons?
Rigorous connective tissue bands
What is origin?
the more stable of a muscles attachment sites
What is insertion?
site that undergoes most of the movement when a muscle contracts
What is the origin, insertion and action of the brachiocephalicus?
O- clavicular intersection
I- ulna, mastoid, dorsal neck
A- pulls limb forward, extends shoulder
What is the origin, insertion, and the action of the sternocephalicus?
O- sternum
I - occipital bone
A - draws head to side
What is the origin, insertion, and the action of the masseter?
O- automatic arch
I- lateral side of the mandible
A - elevates the mandible to close the mouth when chewing
What is the origin, insertion, and the action of the superficial pectoral?
O- cranial sternum
I - greater tubercule of humorous
A - adducts thoracic limb
What is the origin, insertion, and the action of the deep pectoral?
O - sternum
I- greater tubercule of humorous
A- adducts and pulls limb caudally
What is the origin, insertion, and the action of the latissimus dorsi?
O - last 7 thoracic vertebrae and spinous process of the lumbar vertebrae
I - teres major tuberosity of humorous
A - draws limb caudally and flexes shoulder joint
What is action?
The body movement that a contradiction of the muscle will produce
