Human heart

121,956 COPD patients with the age range from 45 to 80-years old who were also receiving the BB treatment. Of the 15 studies, 5 studies included only COPD patients with concomitant coronary heart disease (CHD) including angina pectoris and MI and the other 3 studies evaluated only COPD patients with the heart failure (HF). The duration of the treatment among studied participants ranged from 1 year to 7.2 years.1 The researchers observed that the BB use was associated with the significantly…

specific metabolites like AMP, H+, and K+. Consequently, an increase in blood flow accords with a higher cardiac output that is determined by heart rate and stroke volume. At high work rate, cardiac output (amount of blood pumped by the heart per minute) composed by the product of stroke volume (amount of blood ejected from the left ventricle per beat) and heart rate can reach up to 90% of theoretical maximum value as well as having moderate to high increases in blood pressure. (Burton et al.,…

Aortic Dissection Treatments I. The Search Story When I was little, my aunt had open heart surgery to repair an issue in her aorta. Ever since then I have been fascinated with the human heart, especially the aorta. I used to pretend to be a doctor and walk around the house in a white coat. My aunt would tell me about her surgery, and it always kept me at the edge of my seat. When time came to pick our topics, I naturally leaned towards the aorta. However it was too broad to write one paper on.…

of knowledge, or lack of correct knowledge, of how the human body functioned. Almost all of our understandings of the human body had been from Galen in Ancient Greece’s theories, but they were not very accurate or detailed (Rogers 14-15). It wasn’t until during the Renaissance period (1400s to 1700s) that many European scholars (Leonardo da Vinci, William Harvey, etc.) realized that medical care needed to change,…

The Anatomy of the Mitral Valve The mitral valve, also called the left bicuspid atrioventricular valve, is located in the left side of the heart between the left atrium and the left ventricle. In relation to the sternum, the mitral valve is positioned posteriorly and is at the height of the 4th costal cartilage of the rib cage (Moore, Dalley and Agur, 2014). The valve is composed of two cusps, the anterior and the posterior cusps, which are held in place by chordae tendinous cords (Snell, R.S.…

are involved in the circulatory system, like the heart that is responsible for pumping blood, or the endocrine system that releases hormones into the circulatory system, are dependent on oxygenated blood themselves. The production of red blood cells, which is a major part of the circulatory system, is regulated by a hormone produced in the kidney. But the kidney needs red blood cells to deliver oxygenated blood. So which “evolved” first? The human circulatory system is way more than just some…

The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulation. The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments and cartilage that connects them. The skeletal system performs vital functions — support, movement, protection, blood cell production, calcium storage and endocrine regulation — that enable us to survive. Muscles connect to your skeleton and they contract…

play important roles in the functioning of the human body. The cardiovascular system involves the heart, blood and blood vessels, the respiratory system involves organs and structures, which allow the body to breath, the sensory system allows the body to receive external and internal information while the endocrine system involves the glands and secretes hormones throughout the body. The 4 systems to be discussed all work together to ensure the human body maintains life. The physiology of these…

talking about the power and delicate parts of the heart in different creatures. In the reading he breaks it into four different ideas. In paragraphs one through four he talks about hummingbirds. In paragraph one and two he talks about how the first white explorers found the hummingbirds and called them flying jewels. He explained that the hummingbird's heart beat very fast but is very delicate because when they don’t rest or get something to eat their heart might stop beating. In paragraphs…

with acute food crisis that it might continue to threaten the population. Therefore, the agriculture sector is an important asset branch of economy especially for the majority of developing countries. Besides that, food plays as a basic need of the human body, the food primary nutrition and protein helps to maintain…