Tongue

Your tongue is in your mouth.

It helps you taste food. Tiny bumps on it hold taste buds. These bumps help you know what you eat.

The tongue is made of many muscles. These muscles move the tongue around. They help you chew and swallow food. They also help you talk to friends.

The tongue helps clean your teeth. It stays wet with spit. This keeps it soft and ready to work.

Some muscles change the shape of the tongue. Other muscles move it to new spots. This lets you move your tongue in many ways.

It is a very busy part of your body. Your tongue works all day long!

Your tongue is a busy tool in your mouth.

It is a muscular organ. This means it is made of many muscles. The tongue helps you chew and swallow food. It is also the main organ for taste.

The top of the tongue is called the dorsum. It has many tiny bumps called papillae. Some of these bumps hold taste buds. These buds let you taste what you eat.

A V-shaped groove called the terminal sulcus divides the tongue. This groove separates the front part from the back part. The front part is the oral part. The back part is the pharyngeal part.

Eight muscles work together to move the tongue. Four muscles are intrinsic muscles. These muscles stay inside the tongue. They change its shape. They can make it curl or flatten. The other four are extrinsic muscles. These muscles are anchored to bone. They move the tongue to different spots.

The genioglossus muscle helps the tongue move forward. This is a very important job. The tongue also helps you speak. It even helps clean your teeth!

The tongue is a busy muscular organ inside the mouth.

It helps living things move food for chewing and swallowing. This is a key part of the digestive process. The tongue is also the main organ used for tasting. Its top surface, called the dorsum, is covered in tiny bumps. These bumps are called lingual papillae. Some of these papillae hold taste buds that sense flavors. The tongue stays moist with saliva and has many nerves.

It even helps clean the teeth naturally.

Eight specific muscles work together to make the tongue move. Four of these are intrinsic muscles. They stay inside the tongue and change its shape. They can make the tongue curl, flatten, or lengthen. The other four are extrinsic muscles. These are anchored to bone to change the tongue's position.

For example, the genioglossus muscle pulls the tongue forward. This muscle is often called the "safety muscle." The styloglossus muscle pulls the sides up to help with swallowing. The hyoglossus and palatoglossus muscles help move the tongue up or down.

Inside the mouth, the tongue has a very specific structure. A V-shaped groove called the terminal sulcus divides it.

This groove separates the front oral part from the back pharyngeal part. The oral part is about two-thirds of the total length. The pharyngeal part is the remaining one-third near the throat. A small mark called the foramen cecum sits at the top of the V-shape. The left and right sides are also divided by a vertical section of tissue. This tissue creates a groove called the median sulcus.

Humans have different average sizes for their tongues. The average length from the tip to the throat is 10 cm. In adult males, the average weight is about 99g. For adult females, the average weight is about 79g. The tongue gets its blood from the lingual artery. This artery is a branch of the external carotid artery.

Nerves also carry messages to and from the tongue. The hypoglossal nerve controls the movement of the muscles. Other nerves, like the facial and trigeminal nerves, handle taste and feeling.

Understanding the tongue helps us see how the body grows. The tongue begins to develop in the fourth week of an embryo.

It starts from a small swelling called the median tongue bud. Later, other swellings grow to form the rest of the organ. This process is how the different parts of the mouth are built. We use our tongues every single day to eat and talk. It is a wonderful tool that connects our sense of taste to our speech.

The tongue is a complex muscular organ located within the oral cavity of typical tetrapods. It functions as a muscular hydrostat, which means it moves using only its own muscle tissue without a skeletal structure for support. This organ is essential for the digestive process because it manipulates food for chewing and swallowing. Beyond digestion, the tongue serves as the primary organ for the sense of taste. It also plays a vital role in speech for humans and vocalization in many other animals. Additionally, the tongue acts as a natural tool for cleaning the teeth.

The surface of the tongue is highly specialized for its various roles. The upper surface, known as the dorsum, is covered by masticatory mucosa. This tissue is a keratinized stratified squamous epithelium. Embedded within this surface are numerous projections called lingual papillae. There are four types of papillae: filiform, fungiform, vallate, and foliate. While most of these house taste buds to detect flavors, the filiform papillae are unique because they are not associated with any taste buds. The underside, or ventral surface, is a smooth fold of non-keratinized epithelium. A small fold of mucous membrane called the frenulum tethers the tongue to the floor of the mouth.

The structure of the human tongue is divided into distinct anatomical regions. A V-shaped groove called the terminal sulcus separates the anterior oral part from the posterior pharyngeal part. The oral part makes up roughly two-thirds of the tongue's length and is the visible portion in the mouth. The pharyngeal part makes up the remaining one-third and sits closest to the throat. At the apex of the terminal sulcus lies a small mark called the foramen cecum. This mark is a remnant of the thyroglossal duct from embryonic development. Furthermore, a vertical section of fibrous tissue called the lingual septum divides the left and right sides. This septum creates a visible groove on the surface known as the median sulcus.

Movement of the tongue is controlled by eight specific muscles divided into two groups. The four intrinsic muscles are located entirely within the tongue and do not attach to bone. These include the superior longitudinal, inferior longitudinal, vertical, and transverse muscles. They work to change the tongue's shape by lengthening, shortening, curling, or flattening it. The four extrinsic muscles are anchored to bone and change the tongue's overall position. These are the genioglossus, hyoglossus, styloglossus, and palatoglossus. The genioglossus is often called the "safety muscle" because it is the only muscle that can protrude the tongue forward.

The tongue requires a robust blood and nerve supply to function. The primary blood supply comes from the lingual artery, which is a branch of the external carotid artery. The lingual veins then drain this blood into the internal jugular vein. Nerve supply is more complex because the anterior and posterior parts of the tongue develop from different embryonic structures. The anterior two-thirds receive taste signals through the chorda tympani branch of the facial nerve. General sensation in this area is handled by the lingual nerve. In contrast, the posterior one-third uses the glossopharyngeal nerve for both taste and sensation. The hypoglossal nerve provides motor instructions to almost all the tongue's muscles.

Developmental biology shows how the tongue forms during the fourth week of embryonic life. It begins as a median swelling called the median tongue bud from the first pharyngeal arch. During the fifth week, lateral lingual swellings expand to cover this bud and form the anterior two-thirds. The posterior part develops from the copula and the hypopharyngeal eminence, which arise from the third and fourth arches. This complex growth explains why the different parts of the tongue have different nerve supplies. Understanding these developmental stages helps scientists see how the oral cavity is organized.

Physical measurements of the tongue vary between individuals. The average length of a human tongue from the tip to the oropharynx is approximately 10 cm. There are also differences in average weight between sexes. In adult males, the average tongue weight is about 99g. In adult females, the average weight is approximately 79g. These measurements and the sophisticated muscle coordination allow for the precise movements required for complex human speech and efficient swallowing.