Muscle Tissue

Muscle cells are classified into four main types based on structural and functional properties of cells

1. Striated Skeletal Muscle Tissue 2. Striated Non-Skeletal Muscle Tissue 3. Cardiac Muscle Tissue 4. Smooth Muscle Tissue

Skeletal Muscle Tissue Location in the Body

Attached to bones of the skeleton In the case of facial muscles, attached to other tissues including skin - hence muscles "of facial expression"

Smooth Muscle Tissue Function

Contractions of smooth muscle constrict the vessels they surround. This is particularly important in the digestive system in which the action of smooth muscle helps to move food along the gastrointestinal tract as well as breaking the food down further. Smooth muscle also contributes to moving fluids through the body and to the elimination of indigestible matter from the gastrointestinal system

Cardiac Muscle Tissue Voluntary or Involuntary

Involuntary

Smooth Muscle Tissue Voluntary or Involuntary

Involuntary

How many cell nuclei does Skeletal Muscle Tissues have?

Many nuclei - located at periphery of long cylindrical muscle fiber

Striated Skeletal Muscle Tissue Function

Movement of the skeleton under conscious control, including movement of limbs, fingers, toes, neck, etc. Movement of tissues of facial expression under conscious control, e.g. ability to smile and to frown.

Do Smooth Muscle Tissues have striations?

No "Nonstriated"

How many cell nuclei does Cardiac Muscle Tissues have?

One - centrally located nucleus

How many cell nuclei does Smooth Muscle Tissues have?

One - centrally located nucleus

Cardiac Muscle Tissue Function

Pumping of blood through the heart: Alternate contraction and relaxation of cardiac muscle pumps

Striated Non-Skeletal Muscle Tissue Structure

Striated and share the same properties with striated skeletal muscle except that they are not to bones

Skeletal Muscle Tissue Voluntary or Involuntary

Voluntary

Cardiac Muscle Tissue Location in the Body

Wall of the heart only

Smooth Muscle Tissue Location in the Body

Walls of hollow internal structures, includes: Blood vessels Stomach Intestines Gallbladder Urinary Bladder Airways to the lungs

Do Cardiac Muscle Tissues have striations?

Yes

Do Skeletal Muscle Tissues have striations?

Yes

Cardiac Muscle Tissue Structure

fibers are striated, branched and have a single central nucleus. These fibers are attached at their ends to adjoining fibers by thick plasma membranes called intercalated discs

Smooth Muscle Tissue Structure

not striated. Smooth muscle fibers are small and tapered - with the ends reducing in size, in contrast to the cylindrical shape of skeletal muscle. Each smooth muscle fiber has a single centrally located nucleus.

Striated Skeletal Muscle Tissue Structure

striated" because of its appearance consisting of light and dark bands visible using a light microscope.