Answer :
Answer:
D. Westergren tube.
Explanation:
- Erythrocyte Sedimentation Rate (ESR): This is a blood test that measures how quickly red blood cells (erythrocytes) settle at the bottom of a test tube over a specific period. It is used to detect inflammation in the body.
- Westergren Tube: This is a specialized tube that is used for the ESR test. It has a specific diameter and is calibrated to measure the sedimentation of erythrocytes effectively.
Other Options:
A. Colorimeter: This is used to measure the concentration of colored solutions, not for ESR.
B. Capillary tube: These tubes are generally used for blood sampling or other tests, but not specifically for measuring ESR.
C. Hemacytometer: This device is used for counting blood cells, not for the ESR test.
