An extensive network of blood vessels and nerve fibers extends through both the epimysium and the <u>perimysium</u> of a muscle.
Explanation:
There are many different muscles in the skeleton of the human body and each of them is a joint organ consisting of several types of tissues. Muscle fibers predominate, but there are also blood vessels, nerves and substantial amounts of connective tissue.
In a skeletal muscle the individual muscle fibers are wrapped, and held together, by several different layers of connective tissue. The perimysium is the connective tissue that surrounds each "bundle" of fibers called the fascicle. On the other hand, the epimysium is the layer of irregular dense connective tissue that envelops the muscle. The arteries, veins and lymphatic vessels that reach the muscle must pass through the layers of connective tissue. They take food and oxygen, necessary for muscle functioning.
The core, or middle, of the Sun is the hottest part. Hot gasses bubble up from the core to the surface of the Sun. When the gasses burn, heat and light are produced.
Characteristics that have helped humans survive major changes in the environment are their brains and body. Human's social cooperation with tool making always increases.
