Three types of muscles - Lesson 229

-
In this post we will learn about the Muscles and its types.
There are three types of muscles in the body which are briefly explained below. They are
1. Smooth muscles:- These muscles are also called involuntary or visceral muscles, are those muscle fibers that move internal organs such as the digestive tract, blood vessels, and secretory ducts leading from glands. These muscles are controlled by the autonomic nervous system. They are so called smooth because they have no dark and light fibrils in their cytoplasm. Skeletal muscle fibers are arranged in bundles, while smooth muscle forms sheets of fibers as it wraps around tubes and vessels.

2. Striated muscles:- These muscles are also called voluntary or skeletal muscles which are the muscle fibers that move all bones as well as the face and eyes. We have deep or conscious control over the muscles through the central and peripheral nervous system. The fibers also called cells known Striated muscle fibers have a pattern or way of dark and light bands, or fibrils, in their cytoplasm. Fibrous tissue that envelops and separates muscles is called fascia, which contains the muscles such as blood, lymph, and nerve supply.

3. Cardiac muscle:- This muscle is striated in appearance but like smooth muscle in its auction. Its movement cannot be consciously controlled. The fibers of cardiac muscle are branching fibers and are found in the heart.

Skeletal Muscles actions:- Skeletal or striated muscles which are over 400 in the  human body are the muscles that move bones. When a muscle contracts, one of the bones to which it is joined remains virtually stationary as a result of other muscles that hold it in place. The point of attachment of the muscle to the stationary bone is called the origin or beginning of that muscle. Whenever the muscle contracts, another bone to which it is attached does move. The point of junction of the muscle to the bone that moves is called the insertion of the muscle. The origin of the biceps is at the scapula, and its insertion is at the radius. Tendons are the connective tissue bands that connect muscles to the bones that they move.

Muscles can perform a variety of actions.

In the next post we will come across some of the meanings of the actions and vocabulary terms.
ok..

To go to the prior lesson from here please click the link below.

http://learn-free-medical-transcription.blogspot.com/2010/12/pathological-conditions-of-joints-2_08.html

Home Page:

Comments

Post a Comment

Popular posts from this blog

IMPORTANT RADIOLOGY NUCLEAR MEDICINE TERMS-3-LESSON 148

-
1. Magnetic resonance imaging- A magnetic ground radio signals are used to outline sagittal, coronal, and axial pictures of the body. 2. Megavoltage- High-energy radiation engendered by means of an equipment and employed in restorative x-ray analysis intended for cancer. 3. Nuclear medicine- This is a medical speciality, which examines and employs of radioactive materials called radionuclides within identification and treatment of ailment. 4. Orthovoltage- Emission of low-energy radioactive waves that are employed in pain-killing radiation therapy and exterior skin cancer diseases. 5. Palliative- Means just soothing or painkilling, not curing completely that is not possible. 6. PET scan or positron emission tomography- Radioactive materials are administered using intravenous route and these substances give out positrons. They generate a cross-sectional picture of the metabolism of the body. These images symbolize local concentration of the radio
Read more

HUMAN BONE STRUCTURE - LESSON 200

-
Now in this post we will learn about the structure of the bone. In our human body there are 206 bones of different types are there. The thigh, lower leg, and upper and lower arm consists of long bones. These bones have large surface areas for muscle attachment and are very strong, are broad at the ends where they join with other bones. There are five types of bones in the human body. The five types are long, short, flat, irregular, and sesamoid. 1. Long bones:- These bones are comprised mostly of compact bone and lower amounts marrow, which is located within the medullary cavity, and spongy bone and are characterized by a shaft, the diaphysis, that is much larger in length than breadth. These bones are mostly present in the limbs, including those of the fingers and toes are long bones. Except the wrist, ankle, and kneecap these long bones are located in most. 2. Short bones:- These short bones are generally cube shaped and having a thin layer of compact bone surrounding a
Read more

The Longest Medical Word

-
Image
Today, we will know about an interesting medical term in medical language. This post is just to know about a different thing in the medical language, though this word is used very rarely in our day-to-day medical transcription work. The longest medical word is "Pneumonoultramicroscopicsilicovolcanoconiosis"!!!!!. Can you read at least Pneumonoultramicroscopicsilicovolcanoconiosis.  Now, we will see the meaning of this word.  To know the meaning shall we split the word by word. Okay.  1.  Pneumono 2.  Ultramicrosopic 3.  Silico 4.  Volcano 5.  Conosis. So, Pneumonoultramicroscopicsilicovolcanoconiosis comprises of 5 medical words and in combination, they give a meaning of a certain kind of disease condition related to lungs.  Now, we will see the meaning of each to get the combined understanding of the longest medical word. Pneumono means lungs, ultramicroscopic - means minute, silico means silicon, volcano means eruption, and conosis means abnorm
Read more