Digestion of Food
Question 1: What is Digestion?
Answer:
The conversion of complex food substances into simpler substances that can be absorbed through chemical and mechanical methods is known as digestion.
Question 2: How is food digested?
Answer:
The conversion of food into their simplest forms such as glucose, amino acids, or fatty acids is done by the digestive system. The food which is broken down is then absorbed in the bloodstream from the small intestine and the nutrients are transported to each cell in the body.
Question 3: What are the steps of digestion?
Answer:
The steps of digestion are as follows:
- Ingestion
- Propulsion
- Mechanical digestion
- Chemical digestion
- Absorption
- Defecation.
Question 4: Why is digestion important?
Answer:
Digestion is crucial for breaking down food into nutrients, which the body uses for energy, growth, and repairing of cells.
Question 5: Where does digestion start and end?
Answer:
Digestion initiates in the mouth and ends at the anus.
Question 6: What food takes the longest to digest?
Answer:
Beef, bacon, whole milk hard cheese and nuts take long time to digest. These food take almost 4 hours to digest.
Digestion Of Food
Food is a substance taken from outside that nourishes the body, builds tissues, and supplies energy. Essential components of our food are mainly carbohydrates, proteins, and fats. Vitamins and minerals are also needed in small quantities. Water plays a crucial role in metabolic processes and also prohibits dehydration of the body. Our body cannot utilize biomolecules in food in their original form hence they have to be converted into simple substances in the digestive system.
Digestion is known as the process of conversion of complex food substances into simple absorbable forms. The digestive system carries out the latter through mechanical and biochemical methods. Absorption is the process by which nutrients pass from the alimentary canal into blood and lymph through its mucosa. The absorbed food materials are carried by blood and lymph. The lymph is finally moved to the blood circulation. The blood transports absorbed food materials to different tissues where food materials are utilized for various activities like energy, growth, and repair. This process is called assimilation.
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