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प्रश्न
Opening of inferior vena cava is guarded by _______.
विकल्प
Bicuspid valve
Tricuspid valve
Eustachian valve
Thebesian valve
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उत्तर
Opening of inferior vena cava is guarded by Eustachian valve.
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संबंधित प्रश्न
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| Respiratory surface | Organism |
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| Lungs | Salamander |
| External gills | Bird |
| Internal gills | Amoeba |
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Short answer question.
Identify the incorrect statement and correct it,
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b. A respiratory surface area should be kept dry.
c. A respiratory surface area should be thin, maybe 1mm or less.
Fill in the blanks with the help of chart.
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| Coelenterates | ||
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