Structure of Muscles

There are 3 types of muscles in the body: ​ (a)   muscle which is attached to bones; ​ (b)   muscle which makes up the heart; and ​ (c)   muscles which lines various organs in the digestive, respiratory, circulatory and other systems.

• skeletal
• cardiac
• smooth or visceral

All ​ (a)   requires muscles, which are ​ (b)   which use ​ (c)   energy to contract.

• movement
• organs
• chemical
• thought
• tissues
• electrical

Muscles are considered organs because they are comprised of different types of tissues. When tissues come together, they form organs.

• True

• False

Muscles are comprised of which of these types of tissues?

• skeletal muscle tissue

• connective tissue

• nerve tissue

• blood (which is a connective tissue)

• Muscles are comprised of all of these

Layers of dense connective tissue, called ​ (a)   surround and separate muscles. This tissue give rise to ​ (b)   which are attached to the ​ (c)   of a bone.

• fascia
• tendons
• periosteum

Under the fascia, there is another covering called the ​ (a)   . This covering covers the whole muscle.

• epimysium
• perimysium
• endomysium

Each muscle has bundles of muscle cells. These bundles are called ​ (a)   .

• fascicles
• tendons
• ligaments
• popsicles

Inside each bundle are muscle fibers, which are long and cylindrical. Every muscle fiber has its own connective tissue covering called ​ (a)  

• endomysium
• perimysium
• epimysium

While each muscle fiber has its own covering, there is another covering that surrounds the whole bundle. This covering around the whole bundle is called ​ (a)  

• perimysium
• endomysium
• epimysium

Similar to tendons, muscles sometimes have another connective tissue that helps connect them to bones. This is type of connective tissue is called ​ (a)  

• aponeurosis
• ligament
• fascia