In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation. This is necessary for optimum oxygen utilization as humans are warm blooded animals and neRead more
In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation.
This is necessary for optimum oxygen utilization as humans are warm blooded animals and need extra energy to maintain their body temperature.
Transport in xylem: The transport in xylem is from roots to upwards and takes place in only one direction. This is a kind of passive transport as no energy is required. Through xylem only water and minerals are transported. Transport in phloem: The transport in phloem is bidirectional and food and sRead more
Transport in xylem: The transport in xylem is from roots to upwards and takes place in only one direction. This is a kind of passive transport as no energy is required. Through xylem only water and minerals are transported.
Transport in phloem: The transport in phloem is bidirectional and food and some other products are transported. The transport in phloem is an active transport as it requires energy.
Alveoli Alveoli are sac like structure. Alveoli have network of blood capillaries on their walls. Exchange of materials takes place through diffusion. Nephrons Nephrons are a network of very fine tubules. Nephrons act like transit point for blood capillaries. Exchange of materials takes place becausRead more
Alveoli
Alveoli are sac like structure.
Alveoli have network of blood capillaries on their walls.
Exchange of materials takes place through diffusion.
Nephrons
Nephrons are a network of very fine tubules.
Nephrons act like transit point for blood capillaries.
Exchange of materials takes place because of high pressure.
The kidney has a mechanism to reabsorb water from the filtrate. This depends on how much water is left in the body and in the filtrate. The comparative concentration of water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing more watRead more
The kidney has a mechanism to reabsorb water from the filtrate. This depends on how much water is left in the body and in the filtrate. The comparative concentration of water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing more water. Thus the amount of urine formation is regulated by kidneys.
Plants get rid of carbon dioxide and oxygen through diffusion. Old branches and leaves are shed off when they become useless. Plants release some waste products through roots also. Some waste products are deposited near bark as raisins or gums.
Plants get rid of carbon dioxide and oxygen through diffusion. Old branches and leaves are shed off when they become useless. Plants release some waste products through roots also. Some waste products are deposited near bark as raisins or gums.
The nephron is the functioning unit of kidneys. Nephron consists of a capsule shaped structure called Bowman’s capsule. The filtration of blood takes place in Bowman’s capsule under very high pressure. After that waste product goes to a network of collecting tubules which finally meet in a common coRead more
The nephron is the functioning unit of kidneys. Nephron consists of a capsule shaped structure called Bowman’s capsule. The filtration of blood takes place in Bowman’s capsule under very high pressure. After that waste product goes to a network of collecting tubules which finally meet in a common collecting duct. The collecting duct meet in ureter which carries urine to the urinary bladder.
Food is transported in plants through phloem. The transport in phloem is an active process and involves use of energy. The energy in the form of ATP created osmotic gradient which results in transportation of food through phloem.
Food is transported in plants through phloem. The transport in phloem is an active process and involves use of energy. The energy in the form of ATP created osmotic gradient which results in transportation of food through phloem.
Water and minerals are transported from roots. At the level of roots the root pressure helps in rise of water and minerals up to some height. After that there is complex mechanism at work. The transpiration taking place in leaves creates a suction effect which pulls up water in minerals to great heiRead more
Water and minerals are transported from roots. At the level of roots the root pressure helps in rise of water and minerals up to some height. After that there is complex mechanism at work. The transpiration taking place in leaves creates a suction effect which pulls up water in minerals to great heights.
The plant transport system in highly organized plants contains following: (a) Xylem: To transport water and minerals from roots to other parts. (b) Phloem: To transport food from leaves to other parts.
The plant transport system in highly organized plants contains following:
(a) Xylem: To transport water and minerals from roots to other parts.
(b) Phloem: To transport food from leaves to other parts.
Mammals and birds are warm blooded animals. This means they can control their body temperature and don’t have to depend on environment for their body temperature regulation. Because of this birds and mammals require optimum oxidization of glucose which would be possible with good supply of oxygen. BRead more
Mammals and birds are warm blooded animals. This means they can control their body temperature and don’t have to depend on environment for their body temperature regulation. Because of this birds and mammals require optimum oxidization of glucose which would be possible with good supply of oxygen. By developing four chambered heart they have made it possible to completely segregate the oxygenated and deoxygenated blood in their bodies which is their need because of their habit and habitat.
Describe double circulation of blood in human beings. Why is it necessary?
In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation. This is necessary for optimum oxygen utilization as humans are warm blooded animals and neRead more
In double circulation there is complete segregation of oxygenated and deoxygenated blood. Because of this the blood passes twice through the heart in one cycle of circulation hence the name double circulation.
See lessThis is necessary for optimum oxygen utilization as humans are warm blooded animals and need extra energy to maintain their body temperature.
What are the differences between the transport of materials in xylem and phloem?
Transport in xylem: The transport in xylem is from roots to upwards and takes place in only one direction. This is a kind of passive transport as no energy is required. Through xylem only water and minerals are transported. Transport in phloem: The transport in phloem is bidirectional and food and sRead more
Transport in xylem: The transport in xylem is from roots to upwards and takes place in only one direction. This is a kind of passive transport as no energy is required. Through xylem only water and minerals are transported.
Transport in phloem: The transport in phloem is bidirectional and food and some other products are transported. The transport in phloem is an active transport as it requires energy.
See lessCompare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
Alveoli Alveoli are sac like structure. Alveoli have network of blood capillaries on their walls. Exchange of materials takes place through diffusion. Nephrons Nephrons are a network of very fine tubules. Nephrons act like transit point for blood capillaries. Exchange of materials takes place becausRead more
Alveoli
Alveoli are sac like structure.
Alveoli have network of blood capillaries on their walls.
Exchange of materials takes place through diffusion.
Nephrons
Nephrons are a network of very fine tubules.
Nephrons act like transit point for blood capillaries.
Exchange of materials takes place because of high pressure.
See lessHow is the amount of urine produced regulated?
The kidney has a mechanism to reabsorb water from the filtrate. This depends on how much water is left in the body and in the filtrate. The comparative concentration of water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing more watRead more
The kidney has a mechanism to reabsorb water from the filtrate. This depends on how much water is left in the body and in the filtrate. The comparative concentration of water gives a signal to the brain which then takes the required corrective action of either reabsorbing water or releasing more water. Thus the amount of urine formation is regulated by kidneys.
See lessWhat are the methods used by plants to get rid of excretory products?
Plants get rid of carbon dioxide and oxygen through diffusion. Old branches and leaves are shed off when they become useless. Plants release some waste products through roots also. Some waste products are deposited near bark as raisins or gums.
Plants get rid of carbon dioxide and oxygen through diffusion. Old branches and leaves are shed off when they become useless. Plants release some waste products through roots also. Some waste products are deposited near bark as raisins or gums.
See lessDescribe the structure and functioning of nephrons.
The nephron is the functioning unit of kidneys. Nephron consists of a capsule shaped structure called Bowman’s capsule. The filtration of blood takes place in Bowman’s capsule under very high pressure. After that waste product goes to a network of collecting tubules which finally meet in a common coRead more
The nephron is the functioning unit of kidneys. Nephron consists of a capsule shaped structure called Bowman’s capsule. The filtration of blood takes place in Bowman’s capsule under very high pressure. After that waste product goes to a network of collecting tubules which finally meet in a common collecting duct. The collecting duct meet in ureter which carries urine to the urinary bladder.
See lessHow is food transported in plants?
Food is transported in plants through phloem. The transport in phloem is an active process and involves use of energy. The energy in the form of ATP created osmotic gradient which results in transportation of food through phloem.
Food is transported in plants through phloem. The transport in phloem is an active process and involves use of energy. The energy in the form of ATP created osmotic gradient which results in transportation of food through phloem.
See lessHow are water and minerals transported in plants?
Water and minerals are transported from roots. At the level of roots the root pressure helps in rise of water and minerals up to some height. After that there is complex mechanism at work. The transpiration taking place in leaves creates a suction effect which pulls up water in minerals to great heiRead more
Water and minerals are transported from roots. At the level of roots the root pressure helps in rise of water and minerals up to some height. After that there is complex mechanism at work. The transpiration taking place in leaves creates a suction effect which pulls up water in minerals to great heights.
See lessWhat are the components of the transport system in highly organised plants?
The plant transport system in highly organized plants contains following: (a) Xylem: To transport water and minerals from roots to other parts. (b) Phloem: To transport food from leaves to other parts.
The plant transport system in highly organized plants contains following:
See less(a) Xylem: To transport water and minerals from roots to other parts.
(b) Phloem: To transport food from leaves to other parts.
Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
Mammals and birds are warm blooded animals. This means they can control their body temperature and don’t have to depend on environment for their body temperature regulation. Because of this birds and mammals require optimum oxidization of glucose which would be possible with good supply of oxygen. BRead more
Mammals and birds are warm blooded animals. This means they can control their body temperature and don’t have to depend on environment for their body temperature regulation. Because of this birds and mammals require optimum oxidization of glucose which would be possible with good supply of oxygen. By developing four chambered heart they have made it possible to completely segregate the oxygenated and deoxygenated blood in their bodies which is their need because of their habit and habitat.
See less