Podcast
Questions and Answers
What do we need to do to get energy?
What do we need to do to get energy?
We need to eat food.
From which part of our body do we eat food?
From which part of our body do we eat food?
We eat food through our mouth.
What happens to the eaten food?
What happens to the eaten food?
The eaten food should be digested.
What is digestion?
What is digestion?
What is the system formed by a group of organs responsible for digestion called?
What is the system formed by a group of organs responsible for digestion called?
Which organs form the alimentary canal?
Which organs form the alimentary canal?
What is the first part of the digestive tract?
What is the first part of the digestive tract?
What glands are found around the mouth?
What glands are found around the mouth?
What are the two main parts of the digestive system?
What are the two main parts of the digestive system?
Where does the alimentary canal begin and end?
Where does the alimentary canal begin and end?
Name three organs that are part of the alimentary canal.
Name three organs that are part of the alimentary canal.
Which gland is found in the buccal cavity?
Which gland is found in the buccal cavity?
List two digestive glands other than salivary glands.
List two digestive glands other than salivary glands.
What are the three regions of the stomach?
What are the three regions of the stomach?
Which part of the small intestine is connected to the liver and pancreas?
Which part of the small intestine is connected to the liver and pancreas?
What are the three parts of the small intestine?
What are the three parts of the small intestine?
How long is the large intestine?
How long is the large intestine?
What are the four parts of the large intestine?
What are the four parts of the large intestine?
Where is stool stored before defecation?
Where is stool stored before defecation?
What separates the anus from the rectum?
What separates the anus from the rectum?
What is the function of digestive glands?
What is the function of digestive glands?
What are the four stages of food processing in the human body?
What are the four stages of food processing in the human body?
What is the function of the salivary glands in digestion?
What is the function of the salivary glands in digestion?
How does food move from the mouth to the stomach?
How does food move from the mouth to the stomach?
What role does hydrochloric acid play in digestion within the stomach?
What role does hydrochloric acid play in digestion within the stomach?
What happens during the absorption stage of digestion?
What happens during the absorption stage of digestion?
What is the primary purpose of eating food?
What is the primary purpose of eating food?
How does the digestive system change complex food materials?
How does the digestive system change complex food materials?
What role do enzymes play in the digestive system?
What role do enzymes play in the digestive system?
What does the digestive system do with undigested food particles?
What does the digestive system do with undigested food particles?
Which gas do we take into our body during respiration?
Which gas do we take into our body during respiration?
Which gas do we expel from our body during respiration?
Which gas do we expel from our body during respiration?
What organs are primarily involved in the respiratory system?
What organs are primarily involved in the respiratory system?
Can we live without breathing?
Can we live without breathing?
What are the four accessory organs that help break down food in the small intestine?
What are the four accessory organs that help break down food in the small intestine?
What is the main secretion of the salivary glands?
What is the main secretion of the salivary glands?
Where is the liver located in the human body?
Where is the liver located in the human body?
What is the primary function of bile produced by the liver?
What is the primary function of bile produced by the liver?
What are the exocrine and endocrine functions of the pancreas?
What are the exocrine and endocrine functions of the pancreas?
Through what does the pancreas deliver digestive juice to the small intestine?
Through what does the pancreas deliver digestive juice to the small intestine?
What substance does the gall bladder store?
What substance does the gall bladder store?
When does the gall bladder release bile into the small intestine?
When does the gall bladder release bile into the small intestine?
What is the main function of the digestive system?
What is the main function of the digestive system?
What connects the mouth to the esophagus?
What connects the mouth to the esophagus?
What is the role of the stomach in the digestive system?
What is the role of the stomach in the digestive system?
Name the three parts of the small intestine.
Name the three parts of the small intestine.
Which organ processes waste in the digestive system?
Which organ processes waste in the digestive system?
What does the liver produce to aid in fat digestion?
What does the liver produce to aid in fat digestion?
Which gland produces saliva and what is its function?
Which gland produces saliva and what is its function?
How long is the large intestine approximately?
How long is the large intestine approximately?
Study Notes
Digestive System
- The digestive system is a group of organs that digest the food we eat.
- It consists of the alimentary canal (digestive tract) and digestive glands.
Alimentary Canal (Digestive Tract)
- The alimentary canal begins from the mouth and ends in the anus.
- It consists of the mouth, pharynx, oesophagus, stomach, small intestine, large intestine (colon), rectum, and anus.
Mouth
- The mouth is the first organ of the digestive system.
- It forms the opening of the alimentary canal.
- The mouth consists of teeth and tongue, and various salivary glands are found on the wall of the buccal cavity.
Pharynx
- The pharynx is a muscular tube that connects the mouth to the esophagus.
- It is divided into three parts: nasopharynx, oropharynx, and laryngopharynx.
Esophagus
- The esophagus is a muscular tube that connects the pharynx to the stomach.
Stomach
- The stomach is a J-shaped muscular bag that temporarily stores food.
- It is located between the esophagus and the duodenum.
- The inner wall of the stomach consists of a large number of gastric glands.
Small Intestine
- The small intestine is approximately 5 to 10 meters long and is composed of three parts: duodenum, jejunum, and ileum.
- The duodenum is the initial part of the small intestine and connects to the stomach and pancreas.
- The jejunum is the middle part of the small intestine.
- The ileum is the posterior part of the small intestine.
- It is involved in the absorption of nutrients into the bloodstream.
Large Intestine (Colon)
- The large intestine is about 1.5 meters long and is divided into four parts: the ascending colon, transverse colon, descending colon, sigmoid colon, rectum, and anus.
- It is responsible for processing waste.
- It takes on average 36 hours for waste to move through the large intestine and exit through the rectum.
Rectum
- The rectum is the last portion of the large intestine.
- It stores fecal matter before it is eliminated through the anus.
Anus
- The anus is the opening at the end of the digestive tract, through which waste leaves the body.
Digestive Glands
- The digestive system also relies on various chemicals to aid in the process of breaking down food.
- These are produced by special glands including salivary glands, gastric glands, pancreas, liver, and gallbladder.
Salivary Glands
- Salivary glands produce saliva, which contains enzymes that start the process of digesting carbohydrates.
Pancreas
- The pancreas secretes pancreatic juice, which contains enzymes that break down carbohydrates, proteins, and fats.
Liver
- The liver produces bile, which aids in the digestion of fats.
Gallbladder
- The gallbladder stores and concentrates bile, which is then released into the small intestine.
Process of Digestion in Human Body
- There are four stages of food processing in the human body: ingestion, digestion, absorption, and egestion.
- Food is taken into the mouth and chewed with the help of teeth.
- Salivary glands secrete saliva, which softens the food in the mouth.
- After chewing, the food is swallowed into the pharynx, which finally reaches the stomach through the esophagus (food pipe).
- The wall of the stomach secretes gastric juice, which contains hydrochloric acid that kills microbes present in the food.
Functions of Digestive System
- The digestive system ingests food into our body.
- It acts on complex food material and changes it into simple absorbable form.
- It secretes various enzymes that help in digestion of food.
- It absorbs nutrients required for the body.
- It helps remove undigested food particles from our body.
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Description
Identify and discuss the different aspects of the human digestive system, including the importance of eating, how food is digested, and what happens if we don't eat.