Observe fish in an aquarium. You will find flap like structures on both sides of their heads.
These are flaps which cover the gills. These flaps open and close alternately. On the basis of
these observations, explain the process of respiration in the fish
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although it's not a question of English but Ur answer is...
Respiration is the process of getting oxygen into the blood and to the cells and getting the waste (carbon dioxide) out of the body.
fishes uses it's gills. Gill plates were the precursor of the jaw of the fish.A fish uses muscles of the pharynx (part of the throat) to fill the mouth with water while at the same time closing the external gill slit and then squeezing the water through the gill membranes while opening the slit and closing the mouth. The gill membranes are made up of small filaments with small feathery structures called "lamellae." They are in two rows on each gill arch. Most fish have 4 gill arches in a gill chamber. The gill arches are made up of bones to protect and support the gills. This is where the exchange of oxygen and carbon dioxide take place as it is where many blood vessels containing red blood cells are.As fish swim they can open their mouths and use some of the flowing water to move the oxygen-containing water through the gills. If the fish is stationary it must use only its pharynx to do this. The outside of the gills have a bony cover which helps to protect the gills. Within the gill filaments, blood flows in the opposite direction of the incoming water. This helps with the oxygenation. A fish can extract up to 80% of the oxygen contained in the water.
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although it's not a question of English but Ur answer is...
Respiration is the process of getting oxygen into the blood and to the cells and getting the waste (carbon dioxide) out of the body.
fishes uses it's gills. Gill plates were the precursor of the jaw of the fish.A fish uses muscles of the pharynx (part of the throat) to fill the mouth with water while at the same time closing the external gill slit and then squeezing the water through the gill membranes while opening the slit and closing the mouth. The gill membranes are made up of small filaments with small feathery structures called "lamellae." They are in two rows on each gill arch. Most fish have 4 gill arches in a gill chamber. The gill arches are made up of bones to protect and support the gills. This is where the exchange of oxygen and carbon dioxide take place as it is where many blood vessels containing red blood cells are.As fish swim they can open their mouths and use some of the flowing water to move the oxygen-containing water through the gills. If the fish is stationary it must use only its pharynx to do this. The outside of the gills have a bony cover which helps to protect the gills. Within the gill filaments, blood flows in the opposite direction of the incoming water. This helps with the oxygenation. A fish can extract up to 80% of the oxygen contained in the water.
hope this helps...
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