The study of blood vessels is termed as(1) Angiology(2) Cardiology(3) Haematology(4) HIstology

The study of blood vessels is termed as Angiology.

Let's break it down:

Angiology is the branch of medicine that focuses on the study of blood vessels (arteries, veins, and capillaries) and the lymphatic system. It deals with the structure, function, and diseases of these systems.

Cardiology is the study of the heart and its functions, diseases, and conditions. It is not focused on blood vessels, although blood vessels are involved in circulatory processes.

Haematology is the study of blood and blood-forming organs. It involves understanding blood disorders but doesn't specifically focus on blood vessels.

Histology is the study of tissues at the microscopic level. It involves examining the structure of cells and tissues, but not specifically blood vessels.

Therefore, the correct answer is:

(1) Angiology.