Final answer:
The correct answer is a) Cannula. Cannulas are thin tubes used to create an easy entrance into most vessels of the body, allowing for the administration or removal of fluids. They are commonly used in medical procedures such as intravenous therapy and dialysis.
Step-by-step explanation:
The correct answer is a) Cannula. A cannula is a thin tube that is used to create an easy entrance into most vessels of the body. It can be inserted into blood vessels, body cavities, or other anatomical structures to allow for the administration of fluids, medication, or the removal of fluids such as blood samples. Cannulas are commonly used in medical procedures such as intravenous therapy, dialysis, and surgical operations.