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Through gills
Through skin
By tracheal system
By lungs
How many bones are there in a newly born infant -
How many bones are there in the human body -
How many canine teeth does an adult human have?
How many chambers does a human heart have?
How many layers of skin does a human have?
How many neck canal cells are found in the archegonium of a fern
How many red blood cells does the bone marrow produce every second?
How many teeth does a normal adult dog have?
How many times does the heart beat approx. in a minute in humans
How many valves are there in the human heart?
