Step 1: Summarize the different arrangements of fascicles in muscles example. an
ID: 3512783 • Letter: S
Question
Step 1: Summarize the different arrangements of fascicles in muscles example. an example. multipennate) patterns of arrangement, and name exaples. example. Describe the parallel pattern of arrangement, and name an Describe the convergent pattern of arrangement, and name Describe pennate (unipennate, bipennate, and Describe the circular pattern of arrangement, and name an Step 2: Describe lever systems and their relationships to bone and muscle. Define lever Distinguish the terms effort, fulcrum, and load. Explain the conceptual relationship of leverage to bone, joints, and muscle. Describe first-class, second-class, and third-class levers.Explanation / Answer
Fascicles are present in muscle fibres, which contributes in the speed and muscle force. Fascicles are the bundles of fibers. The arrangement of these fibers in different manner give rise to different pattern of fascicles like parallel, circular, convergent and pinnate
PARALLEL
In this type of arrangement, fascicles run parallel to the muscle axis.
Example: Straplike muscle of thigh, biceps brachii muscle.
CIRCULAR
In this arrangement of fascicles is in the form of concentric rings.. Generally external openings are surrounded by these muscle fascicles.
Example: Sphincter muscle, Orbicularis muscle of eyes and mouth
CONVERGENT
In this muscle, it has a broad origin, and there is convergance of fascicles towards a single tendon
Example: Triangular shaped, pectoralis muscle of thorax.
PENNATE
There are short fascicles in pinnate muscles, and they atr attached with central tendon in oblique pattern. There are three forms:
Unipennate: Only one side of tendon is inserted by tendon. Example: extensor digitorum muscle of leg.
Bipennate: Tendon is inserted by fascicles from both opposite sides. Example: Rectus femoris of thigh
Multipennate: It looks like feather pattern. All fascicles insert in large tendon.
Example: deltoid muscle. Due to this, there is round appearance of shoulder.
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