Blood vessel

One of those organs is the heart, which serves as a pump that helps circulate blood throughout the body. It also serves in the process to oxygenate the blood by pushing the blood to the lungs. This happens by the blood first entering the right atrium at a low pressure and then it is pushed out of the right ventricle at a high pressure to the lungs, where the carbon dioxide and oxygen are exchanged. The oxygenated blood then returns to the heart through the left atrium, at low pressure, and then is

Three mechanisms intrinsic to the kidneys controls, in part, the Glomerular filtration rate. Two mechanisms act by changing the resistance or diameter of afferent arterioles. When the afferent arteriole tighten, within the glomerular capillaries, the pressure decreases. Myogenic regulation is the first of the intrinsic mechanisms that are arteriole-related. Arteriole constriction is when there is an increase in stretch, as observed if pressure increases. To maintain GFR, constriction tends to limit

Contractility is the strength of a ventricular muscle contraction. An increase in contractility results in an increase in stroke volume because more blood is ejected from the heart. Afterload is the resistance that the left ventricle must overcome before it can eject blood. An increase in afterload causes a decrease in stroke volume because less of the blood in the ventricle would be ejected. 2. Antidiuretic hormone (ADH) stimulates the kidneys

“You told me that once you decided not to go back even if Syd didn’t keep her word. We stand a much better chance together than if we go it alone. I told Donovan that I knew and he told me to get out. I am not going back.” Dominique sighed. “Fool.” Ann smiled and Gabby crawled up in Dominique’s lap. “I took money and my sowing things. They would be expensive to replace and it is the closest thing I have to a trade. And this.” Ann set the orb containing Gabby’s namesake on the table. “It was

It function is filter the blood and maintain it in a healthy way. The spleen produces two types of pulp to perform its function, the red and the white pulp (Goodenough & McGuire, 2014). The red pulp filters the damaged blood cells, palates and foreign materials in the blood, so it recycles the blood. On other hand, the white pulp is composed from lymphocytes, macrophages and plasma cells that help clean the blood. These two pulps work interchangeably to make sure the blood is filtered completely from

great blood vessels of the body: the aorta, vena cava, pulmonary trunk, and pulmonary veins. Circulatory Loops There are 2 primary circulatory loops in the human body: the pulmonary circulation loop and the systemic circulation loop. Pulmonary circulation transports deoxygenated blood from the right side of the heart to the lungs, where the blood picks up oxygen and returns to the left side of the

EXERCISE 5 Cardiovascular Dynamics O B J E C T I V E S 1. To understand the relationships among blood flow, pressure gradient, and resistance 2. To define resistance and describe the main factors affecting resistance 3. To describe Poiseuille’s equation and how it relates to cardiovascular dynamics 4. To define diastole, systole, end systolic volume, end diastolic volume, stroke volume, isovolumetric contraction, and ventricular ejection 5. To describe Starling’s Law and its application to cardiovascular

Composed of the heart, blood vessels, and blood, the cardiovascular system is the body system that carries out the tasks of pumping and transporting blood, oxygen, nutrients, and waste products, and other substances throughout the body. The cardiovascular system, however, would not be able to effectively complete these functions without help from what is sometimes referred to as the body’s hardest-working organ- the heart. Approximately the size of a fist, the heart is contains four chambers (the

The heart, blood and blood vessels make up the basis of the cardiovascular system also known as the circulatory system. The average human body contains approximately 5 litres of blood which is carried around the body via a network of blood vessels split into three types; arteries, veins and capillaries. The arteries are the largest of the three vessels and carry blood away from the heart. Veins carry blood to the heart and are smaller than arteries, then finally the smallest vessels known as capillaries

of coronary blood vessels that supply blood to the heart muscles. This reduces the flow of blood to the heart. CAD may further lead to other forms of heart diseases like heart attack, heart failure, and arrhythmia. Depending on the severity of the disease, people suffering from CAD may benefit from Percutaneous Coronary Intervention (PCI) or Coronary Artery Bypass Grafting (CABG). PCI, commonly known as angioplasty is a minimally invasive procedure used to open blocked blood vessels; while