What is a common device used to collect blood samples?

A common device used to collect blood samples is represented by both a syringe and a vacutainer. Each plays a significant role in blood collection, with the syringe being a traditional method for drawing blood from a vein. Syringes allow for the manual collection of blood, providing flexibility in the volume collected and are often used in various medical settings.

Conversely, a vacutainer is specifically designed for blood collection, offering a more standardized and efficient method. It is a vacuum-sealed tube that facilitates the collection of blood samples directly from a vein without the need for additional equipment afterward. The vacutainer system minimizes the risk of contamination and is particularly useful in laboratories for maintaining sample integrity.

The combination of both devices illustrates the various approaches to blood sample collection, catering to different medical needs and ensuring accurate testing and diagnosis. Thus, both a syringe and a vacutainer are indeed commonly used devices for collecting blood samples, making the choice encompassing both options correct.