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a)human blood is red coloured because it contains a red coloured pigment,called haemoglobin that makes it appear red.
b)upward and downward movement of diaphragm occurs consecutively due to movement of lungs and ribcage. when we inhale lungs expand and ribcage also and make diaphragm push down. when we exhale lungs move inward and diaphragm pull up.this process continues.
c) blood donation is considered to be the superior donation because a donation can save anyone's life. therefore we should do blood donation often.
d)yes, blood group 'O'is considered to be the universal donor because a person withOblood group can donate his/her blood to anyone having any blood group.
e)food must have limited amount of salts because more salt can lead us to diseases and less amount of salt in food can cause goitre
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b)upward and downward movement of diaphragm occurs consecutively due to movement of lungs and ribcage. when we inhale lungs expand and ribcage also and make diaphragm push down. when we exhale lungs move inward and diaphragm pull up.this process continues.
c) blood donation is considered to be the superior donation because a donation can save anyone's life. therefore we should do blood donation often.
d)yes, blood group 'O'is considered to be the universal donor because a person withOblood group can donate his/her blood to anyone having any blood group.
e)food must have limited amount of salts because more salt can lead us to diseases and less amount of salt in food can cause goitre
hope it helps
mark me as brainliest
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1. human blood is red due to the presence of RBC (red blood cells)
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