Muscular System L6 Flashcards
The muscles are of three types, Name them?
skeletal, smooth and cardiac
Site of skeletal muscles
Attached to the skeleton
Site of smooth skeleton?
Walls of hollow organs (e.g. stomach, intestine, urinary bladder, etc and in the walls of blood vessels).
Example of sites of smooth muscles?
stomach, intestine, urinary bladder, etc and in the walls of blood vessels
Site of cardiac muscle
Heart Muscle
Nerve supply in the skeletal muscles
Somatic nerve from the Cranial nervous system
Nerve supply in the smooth muscles
Autonomic nerve supply
Nerve supply in the cardiac muscles
Autonomic nerve supply.
Action in the cardiac muscles
Involuntary
Action in the smooth muscles
Involuntary
Action in the skeletal muscles
Voluntary
Examples of smooth muscles
Muscles of respiratory system, digestive system, Walls of the blood vessels
Examples of skeletal muscles
Muscles of the upper & lower limbs, back, abdominal wall
Skeletal muscles are usually described as having two attachments what are they
Origin
Insertion
the proximal end of the muscle and has less movement is?
Origin
The distal end of the muscle and has more movement
Insertion
Attachments may occur?
Fleshy
Tendon
Aponeurosis
Raphe
Rounded cord of fibrous tissue is the definition of?
Tendon
A flat sheet of fibrous tissue is?
Aponeurosis
Interdigitation of two flat muscles ?
Raphe
Classification according to arrangement of skeletal muscle fibres
Parallel (Strap)
Triangular (convergent)
Circular
Pennate
Fusiform
Sartorius muscle is an example for?
Parallel
Pectoralis Major muscle is an example for?
Triangular (convergent)
Orbicularis Oris muscle is an example for?
Circular
Biceps Brachii muscle is an example for?
Fusiform
The muscle has a triangular origin whose fibres converge on to a narrow tendon
Triangular (convergent)