Sacrum The number of sacral vertebrae varies slightly. For instance, the S1S5 vertebrae of a horse will fuse, the S1S3 of a dog will fuse, and four pelvic vertebrae of a rat will fuse between the lumbar and the caudal vertebrae of its tail. The "Stegosaurus" dinosaur had a greatly enlarged neural canal in the sacrum, characterized as a "posterior brain case”. The sacrum is a complex structure providing support for the spine and accommodation for the spinal nerves. It also articulates with the hip bones. The sacrum has a base, an apex, and three surfaces – a pelvic, dorsal and
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