Sacrum sacrovertebral angle, an angle of 30 degrees from the horizontal plane that provides a useful marker for a sling implant procedure. The pelvic surface of the sacrum is concave from the top, and curved slightly from side to side. Its middle part is crossed by four transverse ridges, which correspond to the original planes of separation between the five sacral vertebrae. The body of the first segment is large and has the form of a lumbar vertebra; the bodies of the next bones get progressively smaller, are flattened from the back, and curved to shape themselves to the sacrum, being
O sacrum convivium "O sacrum convivium" exists in Gregorian and Ambrosian chant forms. Some of the many composers who have set the text are as follows: «O Sacrum Convivium» (2018) Obra premiada en el VI Concurso Internacional Amadeus de Composición Coral. O sacrum convivium O sacrum convivium is a Latin prose text honoring the Blessed Sacrament. It was included as an antiphon to Magnificat in the vespers of the liturgical office on the feast of Corpus Christi. The text of the office is attributed with some probability to Saint Thomas Aquinas. Its sentiments express the profound affinity of the Eucharistic celebration, described as