By OpenStax – https://cnx.org/contents/FPtK1zmh@8.25:fEI3C8Ot@10/Preface, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=30015037

Muscles are long cells, grouped together in bundles called fasicles. Each muscle fiber is surrounded by endomysium, where each fascicle is surrounded by a connective tissue called the perimysium. Groups of fasciles create an entire skeletal muscle, which is covered by epimysium.