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.
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 less