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Digestive System and Food Digestion

Explore the process of food digestion and the organs involved in the digestive system. Learn about the role of the mouth, esophagus, stomach, intestines, and supportive organs such as the salivary glands, liver, gallbladder, and pancreas.

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@UnselfishAzalea
1/20
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Questions and Answers

Where does the digestion of food begin?

Mouth

What is the function of the ptyalin enzyme in saliva?

Break down carbohydrates in the mouth

When do babies get their milk teeth and how many are there?

Between 6-9 months, 20 teeth

What is the composition of the crown of a tooth?

<p>Enamel and calcium</p> Signup and view all the answers

Which organ is responsible for the temporary storage of food and the digestion of proteins?

<p>Stomach</p> Signup and view all the answers

What is the function of the villi in the inner walls of the small intestine?

<p>Increase the surface area for absorption</p> Signup and view all the answers

What is the main function of the large intestine?

<p>Absorption of water and minerals</p> Signup and view all the answers

Which organ secretes bile to help absorb fat?

<p>Liver</p> Signup and view all the answers

What can cause Gastritis, an inflammation of the stomach lining?

<p>Excessive consumption of alcohol</p> Signup and view all the answers

Where does the digestion of carbohydrates, proteins, and fats primarily occur?

<p>Small intestine</p> Signup and view all the answers

What is the function of the ptyalin enzyme in saliva?

<p>It helps to digest the carbohydrate of the food in the mouth.</p> Signup and view all the answers

Where does the digestion of food begin?

<p>The digestion of food begins in the mouth.</p> Signup and view all the answers

How many milk teeth do babies typically have, and when are they replaced by permanent teeth?

<p>Babies typically have 20 milk teeth, which are replaced by 28 permanent teeth between 6-12 years of age.</p> Signup and view all the answers

What are the three pairs of salivary glands in a human being called, and what is the importance of saliva?

<p>The three pairs of salivary glands are important for producing saliva, which helps to swallow the food and contains the ptyalin enzyme for digestion.</p> Signup and view all the answers

What type of enzymes are secreted by the glands in the inner walls of the stomach?

<p>Mucous, pepsinogen, and hydrochloric acid enzymes</p> Signup and view all the answers

Where does the absorption of water, certain medicines, and alcohol take place?

<p>Stomach</p> Signup and view all the answers

What are the three sections of the small intestine?

<p>Duodenum, jejunum, and ileum</p> Signup and view all the answers

What is the main function of the villi in the inner walls of the small intestines?

<p>Increase the surface area to help absorption efficiency</p> Signup and view all the answers

What is the main function of the large intestine?

<p>Absorption of water and minerals</p> Signup and view all the answers

What can cause Gastritis, an inflammation of the stomach lining?

<p>Excessive consumption of alcohol, stress, use of certain medications, smoking, bacterial infections, and erratic feeding habits</p> Signup and view all the answers

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Study Notes

Digestion and Nutrition

  • Digestion of food begins in the mouth, where the ptyalin enzyme in saliva breaks down carbohydrates into simpler sugars.
  • Babies typically have 20 milk teeth, which start erupting when they are around 6-12 months old and are replaced by permanent teeth between 6-12 years old.

Salivary Glands

  • There are three pairs of salivary glands in a human being: parotid, sublingual, and submandibular glands.
  • Saliva secreted by these glands contains enzymes that break down carbohydrates, facilitating digestion.

Stomach

  • The stomach is responsible for the temporary storage of food and the digestion of proteins.
  • The stomach lining secretes gastric enzymes, including pepsin and gastric amylase, to break down proteins and carbohydrates.
  • Gastritis, an inflammation of the stomach lining, can be caused by bacteria, viruses, or excessive consumption of alcohol or spicy food.

Small Intestine

  • The small intestine is primarily responsible for the digestion of carbohydrates, proteins, and fats.
  • The inner walls of the small intestine are lined with finger-like projections called villi, which increase the surface area for absorption of nutrients.
  • The small intestine is divided into three sections: duodenum, jejunum, and ileum.

Absorption

  • The absorption of water, certain medicines, and alcohol takes place in the large intestine.
  • The liver secretes bile into the small intestine to help absorb fat.

Large Intestine

  • The main function of the large intestine is to absorb water, electrolytes, and vitamins produced by enteric bacteria.
  • The large intestine is also responsible for storing and eliminating waste.

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