Is when you breathe in oxygen and exhale carbon dioxide
Boating activities decrease along shorelines :)
Pathogenic protozoa comprise a large number of eukaryotic microorganisms which are the causative agent of important parasitic diseases. Some affect human and are of high medical relevance as malaria, toxoplasmosis, leishmaniasis, the Chagas disease, sleepiness disease, amebiasis, giardiasis, and trichomoniasis.
Answer:
A
Explanation:
they are associated with venous sinuses.this valve open one way flow of direction of the heart.