What questions? you didn't ask any
The largest vein in an animal's body is in fact the Vena Cava.
Hope I helped :)
Allergylymphatic disorder is characterized by hypersensitivity to a foreign antigen
Pathogens are spread from bacteria, this bacteria travels throughout the air meaning another person gets it. Some things that can be prevented is take antibiotics to fight the bacteria off and washing your hands daily, also cover your mouth when coughing and sneezing to somewhat stop spreading the bacteria
Answer:
The answer is Natural selection
