Final answer:
The roots 'cyst/o' and 'vesic/o' refer to sac-like structures, commonly known as cysts in general medical terminology and vesicles in neurological development.
Step-by-step explanation:
The root cyst/o refers to a cyst, which is a sac-like structure that may develop in any organ, and commonly found in subcutaneous tissue, as well as in the brain and eyes. The root vesic/o often pertains to a vesicle or a sac-like structure, notably used when describing certain parts of the brain as it develops from the neural tube.
For example, as the neural tube develops into the brain, it forms sac-like enlargements known as primary vesicles which ultimately become different parts of the brain.
These terms are crucial in the field of medicine for describing various structures and conditions that may arise within the body.