Describe the difference in distribution of cell/fiber types in different specific body muscles?

Different cell/fiber have different proportion of fibers and different changes in the absolute or relative cross-sectional area of the fibers according to their type.

Further Explanation:

Cell / Fiber

The striated cells of cardiac and skeletal muscles are alluded to as muscle fibers. Cardiomyocytes are the muscle fibres that form the chambers of the heart, and have a solitary focal core. Skeletal muscle fibers help support and move the body and tend to have peripheral nuclei.

Types of Muscle fiber

In the muscular system, muscle tissue is categorized into three distinct types:  

Skeletal muscles

Skeletal muscles attach to and move bones by contracting and relaxing because of deliberate messages from the nervous system. Skeletal muscle tissue is made out of long cells called muscle fibers that have a striated appearance. Muscle fibers are sorted out into groups provided by veins and innervated by engine neurons .

Smooth Muscles

Smooth muscle is found in the walls of hollow organs throughout the body. Smooth muscle constrictions are automatic developments activated by motivations that movement through the autonomic sensory system to the smooth muscle tissue.  The arrangement of cells within smooth muscle tissue allows for contraction and relaxation with great elasticity. The smooth muscle in the walls of organs like the urinary bladder and the uterus allow those organs to expand and relax as needed. The smooth muscle of the alimentary canal (the digestive tract) facilitates the peristaltic waves that move swallowed food and nutrients. In the eye smooth muscle changes the shape of the lens to bring objects into focus. Corridor dividers incorporate smooth muscle that unwinds and contracts to move blood through the body .

Cardiac muscles

The heart wall is made out of three layers. The middle layer, the myocardium, is responsible for the heart’s pumping action.Cardiovascular muscle, found uniquely in the myocardium, contracts in light of sign from the cardiovascular conduction system to make the heart beat. Cardiac muscle is made from cells called cardiocytes. Like skeletal muscle cells cardiocytes have a striated appearance, but their overall structure is shorter and thicker.  Cardiocytes are expanded, enabling them to associate with a few different cardiocytes, forming a network that facilitates coordinated contraction.

Subject: Health

Level: High school

Keywords: Cell / Fiber, Types, Skeletal muscles, Cardiac muscles,  Smooth Muscles,  

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Muscle cells generally known as the myocytes are the cells that forms the muscle tissue.

Further Explanation:

Myocytes are also known as the muscle fiber in case of cardiac and skeletal myocytes.

There are three types of muscle cells and they are:

1. Cardiac muscle

2. Smooth muscle

3. Skeletal muscle

The muscle fiber is only a single cell which is made up of bundle of myofibrils and filaments that are arranged in segments called as sarcomere. Thin filament have strands of a protein known as actin whereas the thick filament havemyosin protein.

1. Cardiac muscle cells comprises of myocardium which is the middle layer of the cardiac. It consists of sarcosomes that give them energy for contraction.

2. Skeletal muscle cells are present in the muscle tissue which is connected to the skeleton and plays crucial role in locomotion. They are involved in the involuntary muscle. They are striated. And are multinucleated.

3. Smooth muscle cells are arranged in bundles in the form of sheets and due to this organization helps in contraction.

Learn more:

1. Learn more about heart

2. Learn more about blood

3. Learn more about bloodstream

Answer Details:

Grade: College Biology

Subject: Health

Chapter: The body organs

Keywords:

Osteoclasts, osteocytes, locomotion, calcium, phosphate, bone marrow, bone remodeling, stress, fracture, homeostasis, calcium.

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