Human Physiology Poster Presentation

Human Physiology Poster Presentation
The cardiac cycle basically include overall relaxation and contraction of
ventricles as well as atria. This mainly last for approximate 0.8 second. There
are mainly four important stages of cardiac cycle that manly include
"Isovolumic relaxation, Inflow"Isovolumic contraction and Ejection. This
cycle is playing most important role in maintaining coordination to fill and
empty heart of blood. Present study mainly focus upon the manner in which
damage to the left ventricle would impact both CO and BP.
Ventricular Ejection: During this stage, contraction as well as emptying of ventricles
undertake place. While at this stage, aortic and Pulmonary artery valve closes.
Isovolumic Relaxation: At this stage, relaxation of ventricles occurs, within this pressure
get decreased and ventricles get stop to contract as well as relax. Further this has been
evaluated that by this, pulmonary artery and aortic valve close because of no pressure.
There is formative closure of valves.
Ventricular Filling Stage: During this stage blood flows through atria into the ventricles.
Along with this, it has been evaluated that in this ventricles started to get into the
relaxation phase and further lead towards significant drops in ventricles pressure.
The Cardiac Cycle Phases
The above analysis of Cardiac cycle illustrates that, human heart is basically
understood as a muscular organ. This is mainly of a fist size which effectively
pumps blood via set of connections among veins as well as arteries. It is further
define as cardiovascular system in addition to this, it has been evaluated that it
mainly include pulmonary as well as systematic circulation. Further it has been
determined that the cardiac cycle basically involves a combination of
contraction as well as relaxation of ventricles and atria. However, this has been
determined that valves failure to operate properly can lead towards generation
of disruptive blood flow in heart. This further lead towards heart sound. This
sound can be duly heard with the help of stethoscope.
The cardiac cycle mainly include different types of phases. These phases
are being effectively defined below:
Atrial Diastole: It is the stage in which heart chambers are calmed. Within
this it has been evaluated that, aortic valve as well as pulmonary artery
closes and atrioventricular valves are open. It significantly lead towards
making heart chambers to relax in effective manner. Further this has been
determined that it mainly last for 0.1 seconds.
Atrial Systole: This stage basically lasts longer for approximate 0.3
seconds. At this stage both of the ventricles get contract and blood is
forced through pulmonary truck to lungs and aorta to rest of the body.
Further it has been underlined that atrium get contracts in this stage.
Isovolumic Contraction: By this stage contraction of ventricles begin. In
addition to this, it has been understood that valve, pulmonary artery valves
and atrioventricular valves closes. However this not lead towards any form
of transformation in volume. Along with this, it has been underlined that
during this stage there is significant increase in the pressure that duly
generates in ventricles.
The cardiac cycle structure
In order to have proper understanding of the role being played by the cardiac
cycle in the blood flow movement of heart, it is firstly essential to have proper
knowledge of the cardiac structure. According to the figure 1, it has been
evaluated that human heart mainly include four chambers that further include
left as well as right halves. In this, left and right atria is being duly included in
two upper chamber. While on the other hand, left as well as right ventricles is
being posses by lower two chambers.
The above mentioned table depicts that range of pressure that was duly
observed within cardiac chambers during diastole and systole. With having
proper understanding of this lead towards having significant knowledge related
to progression among various stages of cardiac cycle.
Further according to the evaluation it has been determined that main
purpose holding by right ventricle is related to pump de oxygenated blood
via passing through pulmonary arteries as well as pulmonary truck to the
lungs. While on the other hand if it is talked about left ventricles they are
mainly having responsibility which is basically related to pumping of
newly oxygenated blood in the body via aorta.