A capillary tube is used to acquire a small blood sample for CBC (complete blood count) analysis. Suction is not required to transfer the blood from the ?ngertip prick to the tube in part due to _______.

Question

Quizplus · Accepted Answer

Adhesive forces between the water molecules and the glass particles of the tube help draw the blood up the capillary tube without the need for suction. This is due to the attraction between the polar water molecules in the blood and the polar surface of the glass tube.

A Capillary Tube Is Used to Acquire a Small Blood