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Catacomb is a Christian underground burial site prior to the Edict of Milan. 

Opus Alexandrinum 

Match each directional term with its definition.

Which of the following statements about kidneys is false?

Name of the cavity found in amphibians, reptiles, birds and fishes which the feces and the gametes, as well as urine, pass on the way to the outside

The primary function of the respiratory system

The mechanism by which oxygen moves into capillaries from alveoli is

Match the following letters with the correct labels. respiratory system 2edit.jpg

respiratory systemedit2.png

All organisms that require oxygen to carry out their metabolic functions are referred to as ____________.