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NEET-XI-Biology

07: Structural Organisation in Animals

 page 2
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  • #5
    Distinguish between the following
    (a) Prostomium and peristomium
    (b) Septal nephridium and pharyngeal nephridium
    Ans : null (a)


    Prostomium
    		 Peristomium
    Prostomium is a small fleshy lobe, which overhangs the mouth of an earthworm. It helps the organism push into the soil and is sensory in function. The first body segment in the earthworm is called the peristomium. It surrounds the mouth opening.
    (b)


    Septal nephridium
    		 Pharyngeal nephridium
    They are present on both sides of inter-segmental septa behind the 15th segment. They open into the intestines. They are present as three paired tufts in the fourth, fifth, and sixth segments.
  • #5-a
    Prostomium and peristomium
    Ans :


    Prostomium
    		 Peristomium
    Prostomium is a small fleshy lobe, which overhangs the mouth of an earthworm. It helps the organism push into the soil and is sensory in function. The first body segment in the earthworm is called the peristomium. It surrounds the mouth opening.
  • #5-b
    Septal nephridium and pharyngeal nephridium
    Ans :


    Septal nephridium
    		 Pharyngeal nephridium
    They are present on both sides of inter-segmental septa behind the 15th segment. They open into the intestines. They are present as three paired tufts in the fourth, fifth, and sixth segments.