Final answer:
BBP can enter your system percutaneously through needles or sharp instruments that break the skin, which is particularly relevant in certain medical administrations.
Step-by-step explanation:
BBP, or blood-borne pathogens, can enter your system through various means. However, when discussing percutaneous entry, this specifically refers to BBP entering your system through needles or sharp instruments that pierce the skin, thereby allowing pathogens to bypass the skin's protective barrier and enter the bloodstream directly. Often, healthcare settings prefer intravenous administration when a drug is not absorbed well in the gastrointestinal tract, as the plasma levels achieved by intravenous administration are substantially higher. Cell-penetrating peptides (CPPs) are also significant in medicine as they enable the delivery of various bioactive cargos directly into cells.