cardiovascular presentation

8/9/2019 Cardiovascular Presentation

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Members of group:1. Dalu bangun f. 12110201

2. Nur apipah 12110202160

3. Cahyati 1211020172

4. Puput Aji T. 1211020167


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CARDIOVASCULAR

SYSTEM


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DEFINITIONCardiovascular system is circulatory system which

comprises the heart and blood vessels and carries nutrients

and oxygen to the tissues of the body and removes carbon

dioxide and other wastes from them


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O!"#N$HEAT

Th! h!art i" th! pu#p that !j!$t" %!&'yg!nat!%

bl&&% t& th! lung" f&r &'yg!nati&n( an%"i#ultan!&u"ly &'yg!nat!% bl&&% t& th!

"y"t!#i$ $ir$ulati&n f&r !""!ntial $!llular

fun$ti&n an% )a"t! r!#&*al. Th! h!art )!igh"

ar&un% 300g an% i" p&"iti&n!% in th! th&ra$i$$a*ity in th! #!%ia"tinu#( r!"ting b!t)!!n th!

right an% l!ft lung".


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The Heart Has Three Main Layers:

The Pericardium

The Mycardium

The Endcardium


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The Pericardiumcomposed of two sacs surrounding the heart The outer layer

consists of strong fibrous inelastic tissue preventing over%

distension The outer layer is called the parietal pericardium and

the inner layer the visceral pericardium& epicardium which runs

continuously with the parietal layer These membranes are

separated by a potential space in a similar fashion to the pleural

space


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The MycardiumCardiac muscle resembles s'eletal muscle although each cell

has a nucleus and one or more branches Cardiac muscle

appears as a sheet of muscle rather than a large number of

individual cells( this is important to its function) as when an

electrical impulse initiates muscle contraction) the entire muscle

sheet contracts simultaneously causing a huge force of

contraction that can be increased or decreased depending on the

body*s needs


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The EndcardiumThe inner layer of the myocardium) this layer is thin and

covered with epithelial tissue in a similar way to the

transport vessels) thereby preventing the adhesion of blood(

this is essential otherwise the heart would be continuously

firing off clotted blood into the circulation


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CI!C+,#TION


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Each atrium is separated from the ventricles by an atrioventricular

valve -the tricuspid on the right and bicuspid on the left. and

hori/ontally between thin bands of non%conducting fibrous tissue) only

allowing electrical conduction to follow one pre%designated route

through to the ventricles

In comparison to the ventricles the atria are small receiving

chambers for blood returning to the heart The ventricles are large with

a disproportionate amount of muscle on the left due to its increased

wor'load The top of the heart sits in the middle of the chest The apex)

which is mainly composed of the left ventricle) sits around the level of

the left nipple


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THAN+,

cardiovascular presentation

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