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The Anatomy Of Joints And Bones

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The Anatomy of Joints and Bones

Joints and bones are what grant our body with structure, movement, and flexibility. If our bones and joints are compromised, so is our ability to move freely and painlessly.

Joints exist throughout the body in different forms. Some simply put pieces together, and others offer a moving pivot for the bones to flex.

Diarthonic joints connect bones and allow them to move. Examples of diarthonic joints include the elbows and knees.

Amphiartonic joints refer to those that offer the body partial mobility. They connect the bones and determine the direction and range of motion. An example is spinal discs, which allow the spine to move partially while blocking its ability to fully bend or twist.

Finally, synarthotic joints are those that simply connect pieces together. They occur mainly in large areas of bone that have no movement, such as the surface of the skull bone, for example.

Skeletal muscles are complex in nature as well. Their movement is granted by the myofibers that are contained within them, found organized and lined up, protected by an outer membrane called the sarcolemma. Within the nucleus of these cells, mitochondria fuel the myofibers by digesting nutrients and extracting their potential energy for the muscle to contract and relax.

As a muscle contracts, the strong protein molecules within the myofibers are forced to conglomerate with neighboring molecules, tensing up the tissue. As a result, we are able to move our bodies according to how joints have determined our movement to be.

Finally, nerves play a massive role in the transmitting of messages from the brain to the individual muscles, so as to stimulate a reaction via electrical impulses. Muscles are fed by endless webs of capillaries that enable the supply of blood in and out of muscle tissues. As the blood enters the muscles, it oxygenates and nourishes it. As it leaves, it takes away the waste products resulting from the digestion of oxygen and other nutrients.

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BONUS : The Anatomy of the Heart

The heart is one of the most important aging organs to take care of. Needless to say, the heart rules all living functions by providing the body with oxygenated blood. Oxygen is what keeps our cells alive. Without it, normal biological functions would not exist.

Habits like smoking and eating fats high in fat and animal protein increase the risk of artery clogging, artherosclerosis, and heart attack. These substances cause clogs in arteries and reduce the ability of blood to carry oxygen by altering the molecular structure of hemoglobin.

The heart consists of four chambers fed by important arteries and veins that carry blood in and out of it. It is composed entirely of muscles. The pulmonary artery and pulmonary vein are responsible for connecting the heart with the lungs for blood oxygenation, while the aorta is in charge of feeding oxygenated blood out of the heart and into the tissues targeted for oxygenation.

To prevent the mixing of oxygenated and deoxygenated blood, the heart is composed of four distinct chambers divided by what is called the heart septum. When deoxygenated blood enters the heart, it does so through the right atrium. It is then transferred into the right ventricle through the valve.

From the right ventricle, the blood is pumped through the pulmonary artery into the lungs for oxygenation. It is then sent back into the heart into the left atrium.

Once identified as oxygenated, the blood is transferred to the left ventricle to be pumped to the rest of the body. A contraction of the heart muscle pushes the blood out through the aorta, and then travels into the body feeding the respective tissues.
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