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A null finding shows researchers that the study they conducted is practically useless and should be abandoned.
Superior Vena Cava
Vein that delivers oxygen-poor blood from the upper body to the heart.
Oxygen-Poor
Environments or situations where the concentration of oxygen is significantly lower than the atmospheric levels, often creating challenges for aerobic organisms.
Inferior Vena Cava
Vein that delivers oxygen-poor blood from the lower body to the heart.
Three-Chambered Heart
A type of heart structure found in some amphibians and reptiles, consisting of two atria and one ventricle, allowing for a degree of separation between oxygenated and deoxygenated blood.
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