The human heart can create enough pressure that it could squirt blood at a distance of thirty feet

Blood flows through the heart in one direction, from the atria to the ventricles, and out of the great arteries, or the aorta for example. Blood is prevented from flowing backwards by the tricuspid, bicuspid, aortic, and pulmonary valves.

The heart acts as a double pump. The function of the right side of the heart (see right heart) is to collect de-oxygenated blood, in the right atrium, from the body (via superior and inferior vena cavae) and pump it, via the right ventricle, into the lungs (pulmonary circulation) so that carbon dioxide can be dropped off and oxygen picked up (gas exchange). This happens through the passive process of diffusion.

The left side (see left heart) collects oxygenated blood from the lungs into the left atrium. From the left atrium the blood moves to the left ventricle which pumps it out to the body (via the aorta).

On both sides, the lower ventricles are thicker and stronger than the upper atria. The muscle wall surrounding the left ventricle is thicker than the wall surrounding the right ventricle due to the higher force needed to pump the blood through the systemic circulation. Atria facilitate circulation primarily by allowing uninterrupted venous flow to the heart, preventing the inertia of interrupted venous flow that would otherwise occur at each ventricular systole.

Starting in the right atrium, the blood flows through the tricuspid valve to the right ventricle. Here, it is pumped out of the pulmonary semilunar valve and travels through the pulmonary artery to the lungs. From there, blood flows back through the pulmonary vein to the left atrium. It then travels through the mitral valve to the left ventricle, from where it is pumped through the aortic semilunar valve to the aorta and to the rest of the body. The (relatively) deoxygenated blood finally returns to the heart through the inferior vena cava and superior vena cava.

A violin actually contains 70 separate pieces of wood

A person who makes or repairs violins is called a luthier. The parts of a violin are usually made from different types of wood (although electric violins may not be made of wood at all, since their sound may not be dependent on specific acoustic characteristics of the instrument’s construction), and it is usually strung withgut, nylon or other synthetic, or steel strings.

Someone who plays the violin is called a violinist or a fiddler. The violinist produces sound by drawing a bow across one or more strings (which may be stopped by the fingers of the other hand to produce a full range of pitches), by plucking the strings (with either hand), or by a variety of other techniques. The violin is played by musicians in a wide variety of musical genres, including Baroque music, classical, jazz, folk music, rock and roll, and Soft rock. The violin has come to be played in many non-Western music cultures all over the world.

On September 9, 1950 dubbed laughter was used for the first time on television. It was used for the sitcom "The Hank McCune Show."

The Hank McCune Show is an American television situation comedy. Filmed without a studio audience, the series is notable for being the first program to incorporate a laugh track.

The series began as a local Los Angeles program in 1949. NBC placed it on its national primetime schedule at the start of the 1950-51 season. It debuted at 7:00pm Eastern Time on September 9 and was cancelled three months later.

The highest point in Pennsylvania is lower than the lowest point in Colorado

Mount Davis (3,213 ft or 979 m) is the highest point in Pennsylvania. Located in the 5,685 acres (2,301 ha) Forbes State Forest near the hamlet of Markleton in Elk Lick Township, Somerset County, it lies on a gentle crest of a 30-mile (50 km) ridge line extending from central Somerset County southward into Garrett County, Maryland known as Negro Mountain.

The high point was named for John Nelson Davis, an early settler, American Civil War veteran, surveyor, and naturalist known for his studies of the mountain’s flora and fauna. During the Civil War, Davis served in the 102nd Regiment, Pennsylvania Infantry, Company E.

The summit of Mt. Davis may be ascended by car or a number of hiking trails. Its surrounds are noted for their patterns of unusual circular stone formed byperiglacial action. A metal observation tower with a relief map of the region stands near the true high point.

One of the steepest main streets in Canada is located in Saint John, New Brunswick. Over a distance of two blocks the street rises about 80 feet

City of Saint John, is the largest city in the province of New Brunswick, and the second largest in the maritime provinces. The Fundy City was the first incorporated city in Canada. and is situated along the north shore of the Bay of Fundy at the mouth of the Saint John River. The Saint John Metro covers an area of 323 square kilometers across the Caledonia Highlands, which lie in the core of the city. In 2011 the city proper had a population of 70,063, and the population of the Saint John Metro region is currently 127,761. This marks an increase of 4.4% since 2006.

In the U.S. there are approximately 65.8 million cats

Cats are common pets in Europe and North America, and their worldwide population exceeds 500 million. Although cat ownership has commonly been associated with women, a 2007 Gallup poll reported that men and women were equally likely to own a cat.

According to the Humane Society of the United States, as well as being kept as pets, cats are also used in the international fur trade, for making coats, gloves, hats, shoes, blankets and stuffed toys. About 24 cats are needed to make a cat fur coat. This use has now been outlawed in several countries, including the United States, Australia and the European Union. However, some cat furs are still made into blankets in Switzerland as folk remedies that are believed to helprheumatism.

People less often eat cat meat than the flesh of other common domestic animals.

The largest LEGO castle that was ever built was built with 400,000 LEGO bricks and was 4.45 m x 5.22 m

The Lego Group began in the workshop of Ole Kirk Christiansen (born 7 April 1891), a carpenter from Billund, Denmark, who began making wooden toys in 1932.In 1934, his company came to be called “Lego”, from the Danish phrase leg godt, which means “play well”.

It expanded to producing plastic toys in 1947. In 1949 Lego began producing, among other new products, an early version of the now famous interlocking bricks, calling them “Automatic Binding Bricks”. These bricks were based in part on the Kiddicraft Self-Locking Bricks, which were patented in the United Kingdom in 1939 and then there released in 1947. Lego modified the design of the Kiddicraft brick after examining a sample given to it by the British supplier of an injection-molding machine that the company had purchased. The bricks, originally manufactured from cellulose acetate, were a development of traditional stackable wooden blocks that locked together by means of several round studs on top and a hollow rectangular bottom. The blocks snapped together, but not so tightly that they required extraordinary effort to be separated.