Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The cardiovascular system controls the movement of blood through thousands of miles of capillaries so that every tissue in every part of the body is perfused. Essential nutrients are supplied and waste products are removed. The blood has to be kept fluid and the regional circulation has to be adjusted in relation to the needs of a tissue or organ at that time. For example skeletal muscle will need an increased blood flow during exercise. Hence numerous control mechanisms are necessary to supply essential nutrients to each cell of the body. The heart acts as a pump that propels arterial blood through the aorta and receives the venous blood through the superior and inferior vena cava. The left ventricle is thicker as it has to pump blood at a higher pressure into the aorta. The right ventricle works at a lower pressure and pumps into the pulmonary artery.
The venous blood from the vena cavae passes into the right atrium and through the tricuspid valve into the right ventricle. From here during ventricular systole blood is pumped through the pulmonary valve into the pulmonary artery and the lungs where oxygenation takes place. The oxygenated blood is then returned to the left atrium through the four pulmonary veins. From the left atrium the blood passes through the mitral valve to the left ventricle during diastole and during ventricular systole through the aortic valve into the aorta.
The electrical impulse that initiates the heart beat originates in the sino atrial (SA) node. From here the impulse passes across both the atria to the atrio-ventricular node (AV node).There is a physiological delay of the impulse in the AV node and there is also a limit to the number of impulses that can pass through. Thus if a large number of impulses come from the atria as in atrial fibrillation only a certain lesser number of impulses can go through to activate the ventricles. From the AV node the impulses pass through the Bundle of his to divide into the right and left bundle branches. The left bundle branch divides further into two fascicles-the anterior and posterior. The bundle branches end up as the Purkinje system. Conduction problems can occur at all levels. Thus you could have a sino atrial block, AV nodal block of varying degrees, right or left bundle branch block and fascicular block. These will be discussed in the sections on arrhythmias and ECG.
Primary amines can act as bases; they can- Select one: a. Absorb a proton to become R-NH2+2 b. Release a proton to become R-NH2+ c. Absorb a proton to become R-NH3+
Blood functions to maintain homeostasis in the human body through all but which of the following: Answer moving carbon dioxide away from cells following completion of aerobic metab
How to Recognition of Congenital Heart Disease ? The manifestations of CE-ID are different in a neonate, an infant or a child. It is often easy to recognise the presence of CHD
What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other? Morphologically, cnidarians categorize as po
Q. What is Technetium 99M Sestamibi Scan? This study is another form of studying perfusion of the heart. This radioactive study is similar to that of thallium 201. With a combi
The use of the gums in various foods may affect the following functional properties: 1. Water-binding capacity 2. Rheological properties 3. Capacity to form film or gel
Classification of agro-industrial byproducts Based on their nutrient content agro-industrial byproducts can be divided into: 1. Feed low in fiber and low in protein. These ar
Explain Nelfinavir (NFV, Viracept) Nelfinavir is a commonly used protease inhibitor because it is well tolerated. It appears to be less potent than lopinavir/ritonavir or efav
Q. Process of stabilize lipoprotein structure? Ans. Apoproteins not only stabilize lipoprotein structure but also have other important regulatory functions in lipoprotein
estion..
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd