An intradermal injection is placed in which part of the body?

• A. Muscle
• B. Between the layers of the skin
• C. Under the skin
• D. Directly into the bloodstream

Answer: (B)

An intradermal injection is specifically designed to be administered between the layers of the skin, where the substance can be absorbed slowly by the body’s immune system. This technique is commonly used for allergy tests and vaccinations, especially for certain types of vaccines that require a controlled and localized immune response.

The intradermal route allows for a small volume of fluid to be injected into the dermis, the layer of skin just beneath the outer epidermis. Because of the rich supply of immune cells within this layer, it is particularly effective for eliciting an immune response.

Other options describe different routes of administration. Injecting into muscle refers to an intramuscular injection, placing medication under the skin pertains to a subcutaneous injection, and injecting directly into the bloodstream indicates an intravenous injection. Each of these methods serves different purposes and assures varying absorption rates and effects based on the target tissue and desired outcome.