Introduction
The heart is a complex organ which can yield much data to learn more about a person. The contraction of the heart is able to produce sounds indicating how and where the muscle is contracting. The heart produces a total of four sounds, with two of them being major sounds and the other two minor sounds. The first heart sound, S1, is produced by the closure of the atrioventricular valves and the opening of the semilunar valves at the beginning of the systole, producing the lub sound. The second heart sound, S2, is caused by the closing of the semilunar valves and the opening of the atrioventricular valves, marking the end of systole. The S2 sound is higher pitched than S1 due to higher blood pressures in the arteries, and the resulting vibration in ventricles and arteries also producing the dub sound. S3, the third heart sound, is lower in frequency because it occurs when the atrioventricular valves open and quickly fill the ventricles,
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Blood pressure increases successively from supine to sitting and standing positions. Blood pressure is the highest in the standing position because when standing the effect of gravity can cause the rush of blood to be unilateral from head to toe indicating that the effect of blood being pumped out and the force it takes to come out of the heart are more drastic because gravity causes the blood to pool in the feet. When in the sitting position the effect of gravity is lessened because the body is now resting at a sitting position but still has some gravitational effect and maintains a fairly high blood pressure when in comparison to the supine blood pressure. The supine blood pressure has the lowest blood pressure because gravity is even across the whole surface of the supine body, and because the heart is now laying supinely, meaning the blood does not have be pushed out as aggressively to circulate throughout the body (Eser et al,
All in all the heart is a vital organ we need to survive. And with each vessel and each valve working together give us the lubb-dupp sound we are all so familiar with making each heartbeat worth wile. But, what if the heart beat we are all familiar with suddenly had a change of pace from something that may seem small to us, but a big deal to others.
A married couple of 8 years, the Johnsons, have three children. The thing is, even though the Johnsons are married, Mrs. Johnson has been having an affair with a certain Mr. Wilson for the entirety of the marriage, which leads us to this question; are Mr. Johnson’s children actually his, or are they related to Mr. Wilson? A simple blood test can figure this out for us. By using samples of everyone’s blood, it can be determined if the children are not related to Mr. Johnson by seeing if their blood types match. The test involves gathering blood samples of both Mr. Wilson and Mr. Johnson, along with the children and Mrs. Johnson. Antigens in blood can be detected by Anti-serums and if picked up, can tell different blood types apart. For example,
The first Pure Food and Drug Act was put into action by Theodore Roosevelt in 1906. The act was passed to prevent the manufacture, sale, or transportation of misbranded or harmful food, drugs, medicines, and liquors. Due to this act the Food and Drug Administration (FDA) came to be. The FDA is now responsible for the testing of all foods and drugs for human consumption and the label warnings on them as well.
The atria and ventricles are separated by valves known as the AV valves. The purpose of these valves is to prevent blood from flowing in the wrong direction. Following the movement of blood from the atrium, into the ventricle, the AV valve snaps shut which causes the first heart sound of the heart beat. The beat is caused by the closing of two other valves.
A summary of 3,246 individuals (identified by ID numbers) with corresponding systolic blood pressures was used as my primary data set.
Have you ever listened to the sound of your heart through a stethoscope and wonder why it makes a lub-dub sound? While many say that the sound is caused by valves themselves, meanwhile it's caused by the turbulence of the blood when the valves close. The lubb corresponds to the turbulence on the AV valves, and the dubb corresponds to the turbulence created when the pulmonary and aortic valves close. The pause between heart sounds corresponds to the rest between heartbeats. Arteries are large blood vessels which carry blood from the heart to all of the organs and muscles throughout the body, to give them oxygen and you didn't need to function. Arteries are large blood vessels which carry blood from the heart to all of the organs and muscles
Blood flow is constricted here and no sound can be heard. As the pressure in the cuff is slowly alleviated, blood begins to flow through the vessel and a sound can be heard. This is systolic pressure. In exercise 2 when a sound could no longer be heard, this was diastolic pressure and is the point where continuous flow has been restored (VanPutte et al., 2014).
John Rogers was born sometime in 1689 in what would later be known as Frederick County, Virginia . His father, Roger, was 19 and his mother, Elizabeth, was 23 . He lived in the height of tobacco production in Virginia and lived through both the settlement of western Virginia and the French and Indian war. Although he didn’t participate personally in the military conflicts (mostly due to his age at the time) he had a firsthand view of how the war influenced the citizens of the colonies and how increasing numbers of colonists would displace the native population.
What anatomical structure of the heart produces the "lub" and "dub" sounds? The anatomical structure that makes the “lub” is the atrium. This is when the atria closes off at the tricuspid and mitral valves after filling the ventricle. The “dub” sound is the opposite. This is when the ventricles close off at the aortic and pulmonary valves. What are Korotkoff sounds? They are the sounds, heard with a stethoscope, as the pressure from the blood pressure cuff starts to release. How are Korotkoff sounds different from the "lub" "dub" sounds? The Korotkoff Sounds differ from the “lub, dub” sounds because the “lub,dub” sounds can be heard from any normal ear. Whereas the K-sounds need to be heard by stethoscope. The heart beat sound has just two
Introduction: Blood pH is between 7.35 to 7.45. This range is strict, and those who have blood with a pH outside of the range are in danger of illness and death. In order for blood to maintain its pH within a one-tenth range, it uses a bicarbonate buffering system. The buffer resists pH change. Materials and Methods: For this lab, we titrated HCl into Na2CO3 while keeping a pH probe in the solution throughout the process.
position, then their blood pressure would ne higher than when it was measured from the reclined
The table above can also be found in Seeley’s Anatomy and Physiology laboratory manual on page 376.
Regular electrical impulses are sent within the conduction system of the heart prompting contraction (Marieb, 2015). These electrical signals can be identified and documented by the use of an electrocardiography (ECG) machine. In a familiar ECG recording, three waves will occur; The P wave, QRS complex and
The heart is basically a pump that has to circulate the blood around the body delivering oxygenated blood to our organs and then returning deoxygenated blood to our lungs. There are four chambers in the heart, two atria and two ventricles. There are four main valves, mitral, aortic, tricuspid and pulmonary7b.
Almost every college student has an experience with living in the university dormitory. It could be a lot of fun as long as you get along with your roommates. Roommates is one of most significant factors that affects your college life. So, what exactly is good roommates?