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The main function of the small intestine is absorption of nutrients and minerals from food.
Posted by Marisha Sharma 6 years, 8 months ago
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An athlete requires more energy during the race and after. Since demand for the energy is high, the breakdown of food must be speeded up. This requires more oxygen. In order to inhale more oxygen, an athlete breathes faster and deeper.
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Pseudopodium is a temporary protrusion of the surface of an amoeboid cell for movement and feeding.
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Meghna Thapar 6 years, 1 month ago
Science is a branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws.
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Meghna Thapar 6 years, 1 month ago
Chyme is the semi-fluid mass of partly digested food that is expelled by the stomach, through the pyloric valve, into the duodenum. Gas in the stomach contains approximately 15 to 16 percent oxygen and 5 to 9 percent carbon dioxide; the rest is nitrogen. The air that is breathed contains about 21 percent oxygen; thus, some of the swallowed oxygen is absorbed by the blood capillaries in the stomach. Carbon dioxide is formed by reduction of the food by the stomach’s gastric juices. Nitrogen is not absorbed as a gas and is usually passed on.
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Wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece clothing because the air trapped between the two layers of cloths. This air prevents the flow of the heat from our body to the cold surroundings.
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The animals having four chambered stomach are called chewing animals or ruminants animals. For example cow, which always seems to chew something throughout the day.
To digest the cellulose in the food they eat, an enzyme called cellulase is required which isn’t produced by the animals themselves. Hence they require help. The stomach of these herbivores is divided into 4 chambers of which the most important one is the rumen.
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Meghna Thapar 5 years, 9 months ago
The Sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust called a solar nebula about 4.5 billion years ago. As the nebula collapsed because of its overwhelming gravity, it spun faster and flattened into a disk. It was born when a cloud of dust and gas (known as a solar nebula) collapsed; and in the middle of this formation, matter condensed into a burning ball of gas that became our sun.
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Posted by Om Prakash Parida 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
Functions of stomach:
- The inner lining of stomach secretes mucous, hydrochloric acid and digestive juices.
- Mucous protects the lining of stomach.
- HCl makes the medium acidic so that digestive enzymes can perform their functions.
- Mainly protein digestion occurs in stomach.
- HCl also kills the bacteria that may have enter along with the food we eat.
- The digestive juices break down proteins into smaller substances.
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- Amoeba is a microscopic single-celled organism found in pond water which has a cell membrane, a round, dense nucleus and many bubble like vacuoles.
- The shape of amoeba is variable.
- It has tiny finger like projections called pseudopodia or false feet for movement and capture of food.
- It eats tiny organisms by spreading out its pseudopodia around its food particle and then engulfing it.
Posted by Dux Kashyap 6 years, 8 months ago
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Yogita Ingle 6 years, 7 months ago
Opening of stomata: Solutes from neighbouring epidermal and mesophyll cells enter the guard cells lowering its osmotic potential and water potential. This lowered water potential and osmotic potential will allow movement of water into guard cells from neighbouring cells. Guard cells become turgid due to water accumulation in them which results in the opening of the guard cells.
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Warm air being lighter rises up and leaves the room through the ventilators. Fresh air from outside enters the room through the doors and windows.
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- The purpose of the battery in a series circuit is to give the circuit a source of energy.
- The purpose of a switch in a series circuit is to make it easy to open or close the electrical circuit, turning the flow of electricity on or off.
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Meghna Thapar 6 years, 1 month ago
Aerobics is a system of physical conditioning involving exercises (such as running, walking, swimming, or calisthenics) strenuously performed so as to cause marked temporary increase in respiration and heart rate.
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