Raw leafy vegetables and grass are rich in cellulose, a type of carbohydrate. Many animals, including humans, cannot digest cellulose, because they do not have enzymes and certain type of bacteria which can digest cellulose. We cannot survive by taking vegetables in raw form. That's why we boil or cRead more
Raw leafy vegetables and grass are rich in cellulose, a type of carbohydrate. Many animals, including humans, cannot digest cellulose, because they do not have enzymes and certain type of bacteria which can digest cellulose. We cannot survive by taking vegetables in raw form. That’s why we boil or cook vegetables which breaks down cellulose into simple carbohydrates. We can only survive by taking in vegetables in boiled/cooked form.
• Similarity: The basic process of digestion of food and release of energy is the same in amoeba as well as in human beings. In amoeba, Digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances. Gradually the digested food is absorbed. SimilaRead more
• Similarity: The basic process of digestion of food and release of energy is the same in amoeba as well as in human beings. In amoeba, Digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances. Gradually the digested food is absorbed. Similarly, in human beings various digestive juices (mouth, stomach, intestine etc.) act on food and break it down to simpler substances.
•Difference: The digestion process in amoeba is simple while in human beings it is a complex process. The process of ingestion and egestion are also quite different. Amoeba engulf its food by surrounding the food particle with its pseudopodia. The undigested food which is largely carbon dioxide gas is expelled outside by the vacuole. While in human beings, the food (which is complex substance) is taken inside the mouth and undergoes a complex process of digestion and absorption. Finally the undigested food it expelled in the form of faeces.
In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released.
Cellulose (a type of carbohydrate) can be digested by ruminants but not by humans because ruminants have a large sac-like structure called rumen between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humanRead more
Cellulose (a type of carbohydrate) can be digested by ruminants but not by humans because ruminants have a large sac-like structure called rumen between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans.
Liver (the largest gland in human body) secretes bile juice that is stored in a sac called the gall bladder. The bile helps in the digestion of fats. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
Liver (the largest gland in human body) secretes bile juice that is stored in a sac called the gall bladder.
The bile helps in the digestion of fats.
Can we survive only on raw, leafy vegetables/grass? Discuss.
Raw leafy vegetables and grass are rich in cellulose, a type of carbohydrate. Many animals, including humans, cannot digest cellulose, because they do not have enzymes and certain type of bacteria which can digest cellulose. We cannot survive by taking vegetables in raw form. That's why we boil or cRead more
Raw leafy vegetables and grass are rich in cellulose, a type of carbohydrate. Many animals, including humans, cannot digest cellulose, because they do not have enzymes and certain type of bacteria which can digest cellulose. We cannot survive by taking vegetables in raw form. That’s why we boil or cook vegetables which breaks down cellulose into simple carbohydrates. We can only survive by taking in vegetables in boiled/cooked form.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWrite one similarity and one difference between the nutrition in amoeba and human beings.
• Similarity: The basic process of digestion of food and release of energy is the same in amoeba as well as in human beings. In amoeba, Digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances. Gradually the digested food is absorbed. SimilaRead more
• Similarity: The basic process of digestion of food and release of energy is the same in amoeba as well as in human beings. In amoeba, Digestive juices are secreted into the food vacuole. They act on the food and break it down into simpler substances. Gradually the digested food is absorbed. Similarly, in human beings various digestive juices (mouth, stomach, intestine etc.) act on food and break it down to simpler substances.
•Difference: The digestion process in amoeba is simple while in human beings it is a complex process. The process of ingestion and egestion are also quite different. Amoeba engulf its food by surrounding the food particle with its pseudopodia. The undigested food which is largely carbon dioxide gas is expelled outside by the vacuole. While in human beings, the food (which is complex substance) is taken inside the mouth and undergoes a complex process of digestion and absorption. Finally the undigested food it expelled in the form of faeces.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhich part of the digestive canal is involved in: formation of faeces ________________.
formation of faeces large intestine. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
formation of faeces large intestine.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhich part of the digestive canal is involved in: complete digestion of food ________________.
complete digestion of food small intestine. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
complete digestion of food small intestine.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhich part of the digestive canal is involved in: killing of bacteria ________________.
killing of bacteria stomach. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
killing of bacteria stomach.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhich part of the digestive canal is involved in: chewing of food ________________.
chewing of food buccal cavity (Mouth). https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
chewing of food buccal cavity (Mouth).
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhich part of the digestive canal is involved in: absorption of food ________________.
absorption of food small intestine. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
absorption of food small intestine.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhy do we get instant energy from glucose?
In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessName the type of carbohydrate that can be digested by ruminants but not by humans. Give the reason also.
Cellulose (a type of carbohydrate) can be digested by ruminants but not by humans because ruminants have a large sac-like structure called rumen between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humanRead more
Cellulose (a type of carbohydrate) can be digested by ruminants but not by humans because ruminants have a large sac-like structure called rumen between the oesophagus and the small intestine. The cellulose of the food is digested here by the action of certain bacteria which are not present in humans.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See lessWhere is the bile produced? Which component of the food does it help to digest?
Liver (the largest gland in human body) secretes bile juice that is stored in a sac called the gall bladder. The bile helps in the digestion of fats. https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
Liver (the largest gland in human body) secretes bile juice that is stored in a sac called the gall bladder.
The bile helps in the digestion of fats.
https://www.tiwariacademy.com/ncert-solutions/class-7/science/chapter-2/
See less