Published: 18 Feb 2024

Blood Tests

A small blood sample is typically drawn from a nerve in the elbow. For some, the nerve may not be visible, in which case blood may be drawn from the wrist. This helps reduce fear in children.

Blood tests are routine for most people. Results guide treatment plans based on the extent of any potential illness. Hematology departments in hospitals or diagnostic centers typically perform blood tests.

If you have any concerns about your results, consult with your doctor. Children may receive a topical anesthetic to minimize discomfort from the needle. Discuss any recommended tests with your doctor for clarification.

Blood: A Vital Fluid

Blood is a specialized bodily fluid that delivers nutrients, oxygen, and beneficial substances to cells throughout the body. It also transports waste products and metabolites back to the bloodstream.

Blood is essential for immunity and the self-repairing process of coagulation. The clot formed during coagulation seals open wounds and prevents excessive bleeding.

As a liquid connective tissue, blood plays a vital role in:

- Transporting nutrients, oxygen, drugs, and waste materials
- Repairing and healing injuries
- Defending against infections

Blood also carries hormones and signals of tissue damage. In addition to its basic transportation functions, blood performs important immunological functions, such as circulating white blood cells and detecting foreign material with antibodies.