dÃ©jÃ  vu [(day-zhah vooh)] The strange sensation that something one is now experiencing has happened before: âI knew I had never been in the house before, but as I walked up the staircase, I got a weird sense of dÃ©jÃ  vu.â From French, meaning âalready seen.â.
Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell.uscle tissues are derived from the mesodermal layer of embryonic germ cells in a process known as myogenesis. There are three types of muscle, skeletal or striated, cardiac, and smooth.
SMOOTH MUSCLE - STRUCTURE. Smooth muscle (shown below) is made up of fusiform (diamond-shaped) cells with a single nucleus. The cells are arranged in sheets and contain three filament types: a) actin filaments with no troponin and tropomyosin (5 - 8 times more actin than skeletal muscle).