Body Parts That Start With J

Our body is like a big machine or like a mechanism that is made up of many parts.

All parts of the body work in coordination with each other and that’s why there is harmony in the whole body, of course when the body is healthy.

There are parts of the body that are of crucial importance and without which we could not live.

On the other hand, there are also body parts that can be removed if they are not functioning well enough.

Without them the body will work normally, so we can say that some parts of the body are not vitally important.

In this article we will deal with specific parts of the body and describe to you how they work.

Actually, the topic of this article will be all those parts of the body that start with the letter J.

There are only few body parts that start with the letter J, but we will do our best to describe what those body parts are and why they are important.

If you are interested in the anatomy of the human body and if you would like to know more about the parts of the body that start with the letter J, then you should carefully read the article that we have prepared for you.

Most Common Body Parts That Start With J


As you probably know, joints are connections of two or more bones.

In other words, joints are the places on your body in which two or more bones have contact with each other.

All elements of the joint contain nerve endings that conduct the perception of pain.

This is exactly why the joints very often hurt. Joint pain comes naturally with aging.

Also, one of the most common causes of the joint pain is a type of arthritis that is called osteoarthritis.

People in middle age are usually prone to osteoarthritis and this condition always develops very slowly. It is characterized by a strong pain and stiffness.

There are two main classifications of the joints in our body and now we will tell you something more about them.

In a histological sense, there are 3 types of joints in the body: synovial, fibrous and cartilaginous.

In a functional sense, there are also 3 types of joints and they are immovable joints (synarthrosis), slightly moveable joints (amphiarthrosis) and the joints that are freely moveable (diarthrosis).

It is also important to say that these two classifications of joints correlate with each other. What does it actually mean?

Well, it means that immovable joints are fibrous, slightly moveable joints are cartilaginous, while freely moveable joints are synovial.

Now when you know how joints are classified in your body, you have to know that each joint has its own function.


The next body part that starts with the letter J is the jaw. The jaw is actually the jawbone in which the teeth are located.

The upper jaw is fixed and the lower jaw is movable.

Apart from the fact that there are teeth in the jaw, you should know that the jaw also contains muscles for chewing, as well as the jaw joints.

All of them together make up the masticatory organ system.

Maybe you didn’t know, but the lower jaw is the largest bone on the face.

Besides, it is the only movable bone on the face.

It is interesting that the lower jaw is also one of the strongest bones in the whole body.

The lower jaw is connected to the bones of the skull through the jaw joint.

Pain in the jaw occurs often, and the causes can be various. Jaw pain can be caused by sinus, ear and tooth problems.

In addition, it can happen that there are some problems and injuries in the jaw itself, which again can lead to severe pain.

In order to properly treat jaw pain, it is necessary to find out the cause of the pain first.

Only then we can choose the appropriate treatment in order to remove the pain in the jaw.


The jowl is an extra layer of fat located under the face. We can also say that it is the lower part of a cheek.

The jowl is particularly noticeable when it is drooping and fleshy.

The jowl usually occurs in obese people, although sometimes it can be caused by a genetic factor.

In addition, the jowl can also appear as a person ages.

Numerous studies have been conducted on the topic of how to get rid of the jowl.

It has been shown that in addition to surgery, the jowl can be removed with the help of certain exercises that can only be given to you by experts.

As you can see, we are talking about the jowl in humans here.

However, the word jowl can sometimes also refer to animals.

More precisely, the jowl can refer to a fleshy part of animals’ neck.

For example, the jowl or the dewlap is a loose skin that hangs from the neck of the cattle.

Jugular veins

We will also mention jugular veins as a part of the body that starts with the letter J.

The jugular veins are large veins that are located in the neck.

Actually, the jugular veins are stretching from the head to the upper chest and they have a very important role in the human body.

The jugular veins are carrying blood from the head, face and brain back to the heart.

Because of that it is said that jugular veins can help in diagnosing many health problems.

There are three pairs of jugular veins in our neck. There are interior jugular veins, exterior jugular veins and also anterior jugular veins.

There are many signs that can affect the jugular veins. Some of those symptoms can occur around the jugular veins or in the areas that are close to the jugular veins.

For example, if there are any problems with jugular veins, it can cause ear or eye problems.

Also, jugular veins will change your blood flow, which can cause problems with sleeping.

It is also known that if something affects jugular veins, it can also cause headaches, as well as the neck pain.

Some of the most serious conditions that can be caused by some irregularities in the jugular veins are coronary artery disease and heart problems.

In order to treat the conditions of jugular veins, you will have to use blood thinners or different antibiotics.

Antibiotics are especially recommended if your jugular veins are infected.

Sometimes it is necessary to choose a surgical way of treating jugular veins.

It is especially recommended if jugular veins are too damaged or narrowed.

In order to prevent any condition that can be life-threatening, it is recommended to consult your health provider in time.


At the end of this article we will mention the jejunum. It is an organ in the human body and also in some animals that starts with the letter J.

Jejunum is actually the middle part of the small intestine that is movable. The jejunum is located between the ileum and the duodenum.

We can also say that the jejunum is actually the upper half of your small intestine. This part of the small intestine is also called the empty intestine.

Nutrients are mostly absorbed in this part of the small intestine and that is why its function is quite important in the digestion process.

Absorbed nutrients are sent from the jejunum further into the bloodstream.

The causes of inflammation of the jejunum are mostly bacterial and viral infections that must be treated in time to prevent further complications.

The most common symptoms of the jejunum disease are weight loss, fever and abdominal pain.

Also, if you have some other disease, it can happen that it affects the normal functioning of the jejunum.

For example, if you have Crohn’s disease or Celiac disease, it is possible that your jejunum and the whole small intestine will not function well.

If someone is suffering from Crohn’s disease, this person will probably have an inflamed jejunum.

In this case this inflammation has a specific name and it is known as jejunoileitis.

Other conditions that can affect jejunum are: irritable bowel syndrome, intestinal cancer, ulcers, different infections and bleeding.

At the end we will mention an interesting fact that may explain why the jejunum is actually called the empty intestine.

It is known as the empty intestine because it has been proved that after death there is absolutely no content in that intestine.

This is probably the reason why the jejunum is popularly known as the empty intestine.

Other Body Parts Starting With J



Jugular artery

Jugular nerve

Juxta-oral organ

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