Lymphatic tissue is rich in lymphocytes (and accessory cells such as macrophages and reticular cells). The lymphatic tissue includes the lymph nodes, spleen, tonsils, adenoids and the thymus (an organ in the chest that is particularly large during infancy).
The term musical form (or musical architecture) refers to the overall structure or plan of a piece of music; it describes the layout of a composition as divided into sections. In the tenth edition of The Oxford Companion to Music, Percy Scholes defines musical form as a series of strategies designed to find a successful mean between the opposite extremes of unrelieved repetition and unrelieved alteration.
1 Elements of Music. 2  Pitch  register (high or low); Organization of pitches with a pattern of intervals between them creates scales; Words we might use to describe scales: major/minor, chromatic, gapped, pentatonic. Melody, or musical line, is a combination of pitch and rhythm (some say duration). Sometimes a melody is considered to be the theme of a composition.