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Palate

life science Maturity 11-13 Next article →

The palate is the structure that forms the roof of the mouth. It is found in humans and other mammals. This structure is very important for how our bodies work. It acts as a divider between two different spaces. It separates the oral cavity, which is the mouth, from the nasal cavity, which is the nose.

Illu01 head neck
Illu01 head neck

The palate is divided into two distinct sections. The first part is the anterior portion, known as the hard palate. This part is made of bone and sits toward the front. The second part is the posterior portion, called the soft palate. This is also known as the velum. The soft palate is made of fleshy tissue rather than bone.

06-06-06palataltori
06-06-06palataltori

This structure is connected to the nervous system to help us feel things. A specific nerve provides sensory innervation, or feeling, to the palate. This is the maxillary nerve. It is a branch of a larger nerve called the trigeminal nerve. The hard palate is a structure that forms before a human is born. If the parts of the palate do not fuse together completely, a condition called a cleft palate results.

The palate plays a vital role in how humans communicate through speech. It works together with other parts of the mouth to produce specific sounds. These sounds are categorized as various types of consonants. Some examples include velar, palatal, and palatalized consonants. The palate also helps create postalveolar, alveolopalatal, and uvular consonants.

06-06-06palataltori
06-06-06palataltori

We can trace the history of the palate through the evolution of animals. Early synapsids did not have a secondary palate to separate the mouth and nose. This specific feature evolved later in animals called cynodonts. Mammals eventually retained this trait from those ancestors. Many early animals also had teeth on the roof of their mouths. This is known as palatal dentition.

Illu01 head neck
Illu01 head neck

Palatal dentition is still seen in some living creatures today. Modern amphibians and living lepidosaurian reptiles still have these teeth. However, most mammals lost these teeth a long time ago. This loss occurred in the lineage of cynodonts and their mammalian descendants. While most mammals lack these teeth, the structure of the palate remains essential. Other animals like crocodilians also possess a similar structure. Most other tetrapods do not have a true separation between the mouth and nose.

The words we use for this body part have deep linguistic roots. The English words palate and palatum come from Latin. They are also related to the Old French word palat. All of these terms refer to the roof of the mouth. The ultimate origin of the Latin word palatum is unknown. It may have come from the Etruscans. Interestingly, this same Latin word is the source for the word palace, or palatium.

06-06-06palataltori
06-06-06palataltori

Because the roof of the mouth is linked to tasting, the word has expanded in meaning. We sometimes use "palate" to describe the sense of taste itself. For example, a person might be described as having a discriminating palate. This means they are very good at noticing flavors. The term is even used to describe the flavor profile of drinks. A person might say a wine has an oaky palate to describe its taste.

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