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Hint:
Teeth (singular tooth) is defined as an extremely hard, calcified structure found in the jaw bones of various vertebrates. Their primary function is to break down food but in some animals like carnivores they are also used for hunting and defensive purposes.
Complete answer:
The dentition in humans is diphyodont, heterodont and thecodont.
Diphyodont means organisms which contain two sets of teeth primary (which contain 20 teeth) and permanent (which contain 32 teeth).
Thecodont- Humans have thecodont dentition which means that teeth are embedded in sockets of jaw bones.
Heterodont refers to organisms which have more than a single type of teeth.
Adult humans have four different types of teeth.
1) Incisors- The four teeth visible in the front, found in both the upper and lower jaws are called incisors. Their main function is to cut food.
2) Canines- There are a total four canines in our oral cavity. Their role is to tear the food.
3) Premolars- These are also known as bicuspids. Their main function is crushing food. They do not occur in primary dentition.
4) Molars- These are the posterior most teeth in the mouth. Their main function is grinding.
In order to solve this question, we need to know about the cheek teeth.
Cheek teeth refers to molar and premolar teeth in humans. Thus they are also known as post-canines. These contain 2 or more than 2 cusps thus are called multi cuspidate. The cheek teeth crown is small and the root is long.
Option 1- Premaxilla- These are a pair of small cranial bones. These are located at the tip of the upper jaw. It does not always bear teeth. In humans, it is also known as the incisive bone.
Option 2- Maxilla- It is the bone that makes your upper jaw. It contains all the types of teeth i.e incisors, canines, premolar and molars. Therefore, it contains cheek teeth.
Option 3- Palatine - These are two irregular bones seen in cranium. It is found above the uvula in the throat. In combination with the maxilla, they comprise the hard palate.
Option 4- None of the above - Cheek teeth are seen in both the upper and lower jaw in humans that are maxilla and mandible respectively.
So the correct option is option B.
Note:
Mandible is known as the lower jaw or jawbone. It is the strongest, largest and lowest bone in the human cranium. It forms the lower jaw and bears the lower teeth. It is the only movable bone of the cranium (skull).
Teeth (singular tooth) is defined as an extremely hard, calcified structure found in the jaw bones of various vertebrates. Their primary function is to break down food but in some animals like carnivores they are also used for hunting and defensive purposes.
Complete answer:
The dentition in humans is diphyodont, heterodont and thecodont.
Diphyodont means organisms which contain two sets of teeth primary (which contain 20 teeth) and permanent (which contain 32 teeth).
Thecodont- Humans have thecodont dentition which means that teeth are embedded in sockets of jaw bones.
Heterodont refers to organisms which have more than a single type of teeth.
Adult humans have four different types of teeth.
1) Incisors- The four teeth visible in the front, found in both the upper and lower jaws are called incisors. Their main function is to cut food.
2) Canines- There are a total four canines in our oral cavity. Their role is to tear the food.
3) Premolars- These are also known as bicuspids. Their main function is crushing food. They do not occur in primary dentition.
4) Molars- These are the posterior most teeth in the mouth. Their main function is grinding.
In order to solve this question, we need to know about the cheek teeth.
Cheek teeth refers to molar and premolar teeth in humans. Thus they are also known as post-canines. These contain 2 or more than 2 cusps thus are called multi cuspidate. The cheek teeth crown is small and the root is long.
Option 1- Premaxilla- These are a pair of small cranial bones. These are located at the tip of the upper jaw. It does not always bear teeth. In humans, it is also known as the incisive bone.
Option 2- Maxilla- It is the bone that makes your upper jaw. It contains all the types of teeth i.e incisors, canines, premolar and molars. Therefore, it contains cheek teeth.
Option 3- Palatine - These are two irregular bones seen in cranium. It is found above the uvula in the throat. In combination with the maxilla, they comprise the hard palate.
Option 4- None of the above - Cheek teeth are seen in both the upper and lower jaw in humans that are maxilla and mandible respectively.
So the correct option is option B.
Note:
Mandible is known as the lower jaw or jawbone. It is the strongest, largest and lowest bone in the human cranium. It forms the lower jaw and bears the lower teeth. It is the only movable bone of the cranium (skull).
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