Heart Motu Cordis" (1628) by the English physician William Harvey. Harvey's book completely describes the systemic circulation and the mechanical force of the heart, leading to an overhaul of the Galenic doctrines. Otto Frank (1865–1944) was a German physiologist; among his many published works are detailed studies of this important heart relationship. Ernest Starling (1866–1927) was an important English physiologist who also studied the heart. Although they worked largely independently, their combined efforts and similar conclusions have been recognized in the name "Frank–Starling mechanism". Although Purkinje fibers and the bundle of His were discovered as early as the 19th century, their
Alliance of the Hearts of Jesus and Mary Heart of Jesus" also relate it to the Heart of Mary: Agonizing Heart of Jesus, Beloved of the Father, Living Temple of the Holy Spirit, delight of the Immaculate Heart of Mary - I adore Thee and I love Thee, have pity on the dying. Mary conceived without sin, pray for us, who trust in Thee. Praised be the Agonizing Heart of Jesus! Praised be the Compassionate Heart of Mary! A third devotional element often associated with the Hearts of Jesus and Mary is the Body and Blood of Christ represented in the Eucharist. In Catholic teachings, the Blood and