Pathogens are disease-causing agents which can be transmitted between people and infected animals. Pathogens involve bacterium, virus, or other microorganism that can cause disease.
Pathogens can be given off and carried in the air when an infected individual comes in contact with another individual . Correct answer: A
Answer: The circulatory system provides your brain with a constant supply of oxygen-rich blood while your brain regulates your heart rate and blood pressure. Even seemingly unrelated body systems are connected.
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Keratin is what makes up hair, horns, claws, hooves and more. It additionally protects epithelial cells from damage or stress. However, keratin is extremely insoluble in water and organic solvents. You are unlikely to find it in said solvents.
