Cardiovascular System
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Hello I am at my wits end with this assignment I am struggling so much in this course I cannot seem to get the verbiage correct and I am really not understanding my book this is what we have been asked to do but I do not know where to start--If you could please help me I would be so grateful--Thank you
Describe an overview of the key anatomical parts of the cardiovascular system, and how it works. Describe possible diagnostic or surgical procedures associated with the cardiovascular system that are not mentioned in the Q&A section of this unit. Include at least 10 medical terms, including anatomy, diagnostic, and surgical terms.
Do an in-depth analysis of 5 of these terms. Identify the root, suffix, prefix, and their literal meaning. Describe how clinicians commonly use the words.
I am struggling so much with this class any help would be so greatly appreciated. I have read my book over and over.
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Solution Summary
This solution describes an overview of the key anatomical parts of the cardiovascular system, and how it works. It also includes an indepth analysis of five key concepts.
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Hi,
Let's get you started on this interesting assignment! One approach is to look at information from various sources for each question, which you can consider for your final copy. This is the approach this response takes. I also included links for further expansion and a brief excerpt for further consideration.
RESPONSE:
1. Describe an overview of the key anatomical parts of the cardiovascular system, and how it works.
Generally, the key anatomic components of the CV system are listed as.
a. Parallel and series arrangement of the circulation
b. Normal anatomy and blood flow in the heart
c. Arrangement of fibers in the ventricular wall
d. Normal coronary artery anatomy (1)
Expanding on these key four components, the specific anatomical parts of the heart are: [SA node, AV node, AV bundle. purkinje fibers]. Heart is muscular, parallel pumps (right and left). The right receives deoxygenated blood and pumps to lungs. The left receives oxygenated blood from lungs and pumps to body organs. See heart information and graphics at URL: http://www.jdaross.cwc.net/heart.htm. The heart is in pericardial cavity of thorax surrounded by pericardium [visceral, parietal]. The Heart Histology has three layers:
1. Epicardium = visceral pericardium (outer serous epithelium)
2. Myocardium, thick layer of cardiac muscle
3. endocardium, simple squamous epithelial lining chambers and valves (2)
There are four Heart Chambers: Right & Left atria receive venous blood; and right & left ventricles pump blood into arteries. The Right & Left chambers are separated by a septum [interatrial] [interventricular]. Heart Valves closing produce heart beat . The semilunar valves is at base of aorta & pulmonary trunk [aortic & pulmonary] and atrioventricular valves between atria & ventricles
§ Right AV valve [tricuspid]
§ Left AV valve [bicuspid]
§ chordae tendineae extend from AV valves to papillary muscle on walls of ventricles (2)
Coronary circulation - The heart itself needs to be supplied with blood. This is delivered by the two coronary arteries and their branches. The right coronary artery takes its origin from the aorta just distal to the aortic valve and appears on the surface of the heart between the pulmonary trunk and the auricle of the right atrium. Major branches of the right coronary artery include its marginal branch, posterior interventricular branch, and AV nodal branch. The right coronary artery is distributed to the right atrium, right ventricle, and variable portions of the left atrium and left ventricle. The Cardiac Cycle has two main phases: Systole = contraction of ventricles [AV Valves close] and Diastole = relaxation of ventricles [Semilunar Valves close].
When surgically removed from the body, the heart will continue to beat for several hours provided it is supplied with the appropriate nutrients and salts. This is possible because the heart possesses its own specialized conduction system and can beat independently even after being separated from its nerve supply. The extrinsic (arising external to the heart) nerve supply coming from the nervous system serves to modify and control the intrinsic (inherent to the heart itself) beating established by the heart. (2)
As mentioned above, there are four basic components to the heart's conduction system
(1) sinoatrial node (SA node)
(2) inter-nodal fibre bundles
(3) atrioventricular node (AV node)
(4) atrioventricular bundle (2)
EXTRA INFORMATION: EXCERPT
The sinoatrial (SA) node is a small mass of specialised cardiac muscle situated in the superior aspect of the right atrium. It lies along the anterolateral margin of this ...
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