Skeletal Muscle Tissue

This is the skeletal muscle tissue shown in the photo at the right and this skeletal muscle plays an important role in the human body and I will discuss these functions.
1. First I will discuss the first the functions as a whole, one it helps to produce movement which is the muscle contraction and help you to respond quickly.
2. Also, they help to maintain posture and this is because they make tiny adjustments which help us maintain our body posture or seated up.
3. These muscles help to maintain the stabilization of joints because the muscles pulling on bones causes movements  and helps to strengthen and stabilize them.
4. Last it helps to generate heat because they contract which helps to maintain normal body temperature and it's the most important muscle type for generating the heat.
Now just for some individual structures of what they are:
Muscle- it consists of hundreds to thousands of muscle cells, plus connective tissue wrappings, blood vessels, and nerve fibers
Fascicle- is a portion of the muscle and is a discrete bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath
Muscle fiber- is a elongated multinucleate cell; which has a banded appearance.
Myofibril or fibril- is a rodlike contracile element; they occupy most of the muscle cell volume; bands of adjacent myofibrils are aligned; and composed of sarcomeres arranged end to end.
Sarcomere- it's the contractile unit, composed of myofilaments made up of contractile proteins
Myofilament or filament- there are two types thick and thin the thick contain bundled mysoin molecules; and thin contain actin molecules.

This is an important part of the human body to me because of those top four functions: produce movement, maintain posture, stabilize joints, and help to maintain temperature. To me I would have to say it's extremely important without this there would be no life for us because not having movement would be the worst filling in the world and that's why to me.

EKG Lab

Types of Fractures

Comminuted Fracture- Bone fragments into three or more pieces, particularly common in the aged, whose bones are more brittle.

Compression Fracture- Bone is crushed, is common in porous bones (i.e., osteoporotic bones) subjected to extreme trauma, as in a fall.

Spiral Fracture- Bagged break occurs when excessive twisting forces are applied to a bone, is common sports fracture.

Epiphyseal Fracture- Epiphysis separates from the diaphysis along the epiphyseal plate, and tends to occur where cartilage cells are dying and calcification of the matrix is occurring.

  Depressed Fracture- Broken bone portion is pressed inward, typical of skull fractures.

Greenstick Fracture- Bone breaks incompletely, much in the way a green twig breaks. Only one side of the shaft breaks; the other side bends, is common in children, whose bones have relatively more organic matrix and are more flexible than those of adults.







Now we will discuss some more about these fractures and little of bone repair. It's important to know the type of fracture you have because that why the doctor can give you the proper treatment and that why the bone will heal properly. So that is why it's important to understand and know what type of fracture it's that you have. Now to discuss some treatment, to treat a fracture you must be by reduction or the realignment of the broken bones. There are two types of reduction closed and open, closed is when the bone ends are put into position by the doctor's hands, and in open the bone ends are secured by pins or wires. Then of course everyone knows then it's immobilized by a cast or traction. Then it takes six to eight weeks to heal and that is important to know that way you know how your bones heal and understand what goes into the healing process.

Directional Body Terms

Superior (cranial) Toward the head or end or upper part of a structure or the body; above

Inferior (caudal) Away from the head end or toward the lower part of  a structure or the body; below

Anterior (ventral) Toward or at the front of the body; in front of

Posterior (dorsal) Toward or at the back of the body; behind

Medial- Toward or at the midline of the body; on the inner side of

 Proximal- Closer to the origin of the body part or the point of attachment of a limb to the body trunk

Distal- Farther from the origin of a body part or the point of attachment of a limb to the body trunk

Superficial (external) Toward or at the body surface

Deep (internal) Away from the body surface; more internal

Intermediate- Between a more medial and a more lateral structure

Lateral- Away from the midline of the body; on the outer side of

Why are the Directional Body Terms important to science, I believe this is because it helps to direct where the body parts are on the body and would help to discuss to others doctors which way to cut or where something is located. Another reason why I believe these terms are helpful is just to know the language of Anatomy which I think plays a role of how and why doctors learn how to discuss this. That to me is why these terms even play any role at all in the world and that's why I think it's important in the world of Anatomy.