Muscle/StructureofMuscle/ClassificationofMuscle/SkeletalMuscleStructure

提供:一歩一歩
2019年6月13日 (木) 14:24時点におけるSHolroydAtWeilCornellMedQatar (トーク | 投稿記録)による版 (ページの作成:「 == Skeletal muscle structure == Link to Video explanation A whole skeletal muscle (such as the biceps) is made up of...」)
(差分) ← 古い版 | 最新版 (差分) | 新しい版 → (差分)
ナビゲーションに移動 検索に移動


Skeletal muscle structure

Link to Video explanation

A whole skeletal muscle (such as the biceps) is made up of a number of fascicles. A fascicle is made up of a group of muscle fibers (cells) with associated blood vessels and nerves. Within each muscle fiber are a number of myofibrils that run the entire length of the fiber.

Skeletal muscle gross structure 1.jpg

Download for free at http://cnx.org/contents/7c42370b-c3ad-48ac-9620-d15367b882c6@19.

Muscle fibers are long cylindrical multinucleated cells that run the whole length of the muscle. Note the alternating light and dark bands that run along each fiber, this is why skeletal muscle is said to be striated.

Skeletal Muscle Gross Structure 1A.jpg


Challenge Quiz

You must wait for the CORRECT! 正確!

<GIFT> //LEVEL:2 //RAND Skeletal muscle fibers are grouped together in {~whole muscles~=fascicles}.


//LEVEL:2 //RAND Skeletal muscle fascicles group together to form {~=whole muscles~muscle fibers}.


//LEVEL:2 //RAND Muscle fibers are normally {~=long~short} {~=cylindrical~round} cells.


//LEVEL:2 //RAND How many nuclei does a muscle fiber have? {~none~one~=many}


//LEVEL:2 //RAND Skeletal muscle is also known as {~=striated~smooth} muscle.


//LEVEL:2 //RAND Muscle fibers contain {~=myofibrils~fascicles} that {~are short~=run the length of the fiber}.