Functions Of The Salivary Glands - Structure Of The Salivary Glands - Salivary Glands Anatomy
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In this video we discuss
In this video we discuss the function of the salivary glands and the structure of the salivary glands. We cover the types of salivary glands, major salivary glands and minor salivary glands.
Transcript/notes
Salivary glands
The salivary glands play an important role in your body. There are both major glands and minor glands, and the minor glands are often referred to as intrinsic salivary glands and they are located in and around the oral cavity.
It is estimated that there are 800 to 1000 minor salivary glands located within the mucous membrane lining of the mouth and tongue. These glands contribute less than 5% of the total amount of saliva produced and there are 4 types of minor glands, buccal glands, located in the cheeks, lingual glands located on the tongue, palatine glands located in the roof of the mouth, and the labial glands located in the lips.
An important minor salaviary gland is Von ebners glands which are located around the circumvallate and foliate papillae of the tongue, and they release lingual lipase, which is an enzyme that begins the digestion or break down of fats.
There are 3 types of major salivary glands, parotid salivary glands, submandibular salivary glands, and sublingual salivary glands.
The parotid glands are located just in front of your ears, they are the largest of the salivary glands and they produce 25 to 30% of the saliva and transport it through the parotid duct to the oral cavity.
The submandibular glands are located under the tongue, they produce about 60 to 70% of saliva and transport it through the submandibular duct, releasing it under the front of the tongue.
The sublingual glands are also located under the tongue, they produce 3 to 5% of saliva, and they release it through many ducts under the tongue.
There are 2 types of secretory cells within these large glands, serous cells and mucous cells. The mucous cells secrete mucin and the serous cells secrete a fluid containing water, electrolyes and salivary amylase, which is an enzyme that digests or breaks down larger carbohydrates into smaller carbohydrates. The parotid gland produces only serous secretions and the submandibular and sublingual glands produce both serous and mucous secretions.
Now for saliva.
The body secretes between 1 and 1.5 liters of saliva in a day, and slaiva is composed of about 99.5% water. Other components of saliva include electrolytes, digestive enzymes, metabolic wastes and antibacterial elements.
This saliva produced by the salivary glands has many important functions in the body. Saliva moistens food, making it easier to swallow. It starts the chemical breakdown of some carbohydrates and fats through the enzymes contained in saliva. By dissolving food molecules, saliva stimulates taste receptors on the tongue. Because saliva contains some antibacterial elements, it helps to inhibit bacterial growth in the oral cavity.
Timestamps
0:00 Overview of salivary glands
0:10 The 4 types of minor salivary glands
1:37 Von ebners glands
1:53 The 3 types of major salivary glands
1:03 The parotid glands
1:16 The submandibular glands
1:27 The sublingual glands
1:37 The 2 types of secretory cells - serous and mucous cells
2:06 What is saliva?
2:24 Functions of saliva in the body
Transcript/notes
Salivary glands
The salivary glands play an important role in your body. There are both major glands and minor glands, and the minor glands are often referred to as intrinsic salivary glands and they are located in and around the oral cavity.
It is estimated that there are 800 to 1000 minor salivary glands located within the mucous membrane lining of the mouth and tongue. These glands contribute less than 5% of the total amount of saliva produced and there are 4 types of minor glands, buccal glands, located in the cheeks, lingual glands located on the tongue, palatine glands located in the roof of the mouth, and the labial glands located in the lips.
An important minor salaviary gland is Von ebners glands which are located around the circumvallate and foliate papillae of the tongue, and they release lingual lipase, which is an enzyme that begins the digestion or break down of fats.
There are 3 types of major salivary glands, parotid salivary glands, submandibular salivary glands, and sublingual salivary glands.
The parotid glands are located just in front of your ears, they are the largest of the salivary glands and they produce 25 to 30% of the saliva and transport it through the parotid duct to the oral cavity.
The submandibular glands are located under the tongue, they produce about 60 to 70% of saliva and transport it through the submandibular duct, releasing it under the front of the tongue.
The sublingual glands are also located under the tongue, they produce 3 to 5% of saliva, and they release it through many ducts under the tongue.
There are 2 types of secretory cells within these large glands, serous cells and mucous cells. The mucous cells secrete mucin and the serous cells secrete a fluid containing water, electrolyes and salivary amylase, which is an enzyme that digests or breaks down larger carbohydrates into smaller carbohydrates. The parotid gland produces only serous secretions and the submandibular and sublingual glands produce both serous and mucous secretions.
Now for saliva.
The body secretes between 1 and 1.5 liters of saliva in a day, and slaiva is composed of about 99.5% water. Other components of saliva include electrolytes, digestive enzymes, metabolic wastes and antibacterial elements.
This saliva produced by the salivary glands has many important functions in the body. Saliva moistens food, making it easier to swallow. It starts the chemical breakdown of some carbohydrates and fats through the enzymes contained in saliva. By dissolving food molecules, saliva stimulates taste receptors on the tongue. Because saliva contains some antibacterial elements, it helps to inhibit bacterial growth in the oral cavity.
Timestamps
0:00 Overview of salivary glands
0:10 The 4 types of minor salivary glands
1:37 Von ebners glands
1:53 The 3 types of major salivary glands
1:03 The parotid glands
1:16 The submandibular glands
1:27 The sublingual glands
1:37 The 2 types of secretory cells - serous and mucous cells
2:06 What is saliva?
2:24 Functions of saliva in the body
6 سال پیش
در تاریخ 1397/04/10 منتشر شده
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