How much debt do we have with the country where leeches began being used for blood-letting?
about $1.18 trillion
Title: Cardiac cycle
Passage: The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole (die - ASS - toe - lee), followed by a period of robust contraction and pumping of blood, dubbed systole (SIS - toe - lee). After emptying, the heart immediately relaxes and expands to receive another influx of blood returning from the lungs and other systems of the body -- before again contracting to pump blood to the lungs and those systems. A normally performing heart must be fully expanded before it can efficiently pump again. Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle, or heartbeat, takes about 0.8 second to complete the cycle.
Title: Annelid
Passage: Accounts of the use of leeches for the medically dubious practise of blood-letting have come from China around 30 AD, India around 200 AD, ancient Rome around 50 AD and later throughout Europe. In the 19th century medical demand for leeches was so high that some areas' stocks were exhausted and other regions imposed restrictions or bans on exports, and Hirudo medicinalis is treated as an endangered species by both IUCN and CITES. More recently leeches have been used to assist in microsurgery, and their saliva has provided anti-inflammatory compounds and several important anticoagulants, one of which also prevents tumors from spreading.
Title: National debt of the United States
Passage: As of July 31, 2018, debt held by the public was $15.6 trillion and intragovernmental holdings were $5.7 trillion, for a total or ``National Debt ''of $21.4 trillion. Debt held by the public was approximately 77% of GDP in 2017, ranked 43rd highest out of 207 countries. The Congressional Budget Office forecast in April 2018 that the ratio will rise to nearly 100% by 2028, perhaps higher if current policies are extended beyond their scheduled expiration date. As of December 2017, $6.3 trillion or approximately 45% of the debt held by the public was owned by foreign investors, the largest being China (about $1.18 trillion) then Japan (about $1.06 trillion).
Title: Finances of The Church of Jesus Christ of Latter-day Saints
Passage: By the time Lorenzo Snow became church president in 1898, the church was $2.3 million in debt. Snow reemphasized the payment of tithing (giving 10% of one's income to the church) and by 1907 the church was completely out of debt and since then has not used debt to fund its operations, even for capital projects. An early pioneer venture of the LDS Church was ZCMI which lasted from 1868 to divesting ZCMI Center Mall in 2007.
Title: Chordae tendineae
Passage: When the ventricles of the heart contract in ventricular systole, the increased blood pressures in both chambers push the AV valves to close simultaneously, preventing backflow of blood into the atria. Since the blood pressure in atria is much lower than that in the ventricles, the flaps attempt to evert to the low pressure regions. The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position.
National debt of the United States Annelid