What is the structure of muscle that is a connective tissue surrounding a fascicle?

The structure of muscle that is a connective tissue surrounding a fascicle is called the perimysium. To understand this, let's break down the components of muscle tissue.

Muscles are made up of individual muscle fibers, which are grouped together in bundles called fascicles. Each fascicle is surrounded by a layer of connective tissue called the perimysium. The perimysium is responsible for supporting and protecting the fascicles within the muscle.

To visualize this, think of a bundle of straws as the fascicle, and a rubber band wrapped around the straws as the perimysium. The perimysium not only connects the fascicles together but also contains blood vessels and nerves that supply the muscle fibers within the fascicles.

So, to answer your question, the perimysium is the connective tissue surrounding a fascicle in the structure of muscle.