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The heart is a muscular organ situated in the mediastinum.It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...
The heart tube continues stretching and by day 23, in a process called morphogenesis, cardiac looping begins. The cephalic portion curves in a frontal clockwise direction. The atrial portion starts moving in a cephalically and then moves to the left from its original position. This curved shape approaches the heart and finishes its growth on ...
Complex relationships between protective and vulnerability factors on the effect of childhood home stress on psychological illness, cardiovascular illness and adaption have been observed. [40] ANS related mechanisms are thought to contribute to increased risk of cardiovascular disease after major stressful events. [41]
Such experiences can promote healthy development within an environment of supportive relationships, giving children the chance to observe and practice healthy responses to stressful events. [9] Tolerable stress comes from adverse experiences that are more intense in nature but short-lived and can usually be overcome. [4]
Social stress is stress that stems from one's relationships with others and from the social environment in general. Based on the appraisal theory of emotion, stress arises when a person evaluates a situation as personally relevant and perceives that they do not have the resources to cope or handle the specific situation.
Cardiac physiology or heart function is the study of healthy, unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; the cardiac cycle and cardiac output and how these interact and depend on one another.
When both the heart and lungs are healthy, pulmonary wedge pressure is equal to left ventricle diastolic pressure and can be used as a surrogate for preload. [3] Pulmonary wedge pressure will overestimate left ventricle pressure in people with mitral valve stenosis , pulmonary hypertension and other heart and lung conditions.
Trauma affects all children differently (see stress in early childhood). Some children who experience trauma develop significant and long-lasting problems, while others may have minimal symptoms and recover more quickly. [56] Studies have found that despite the broad impacts of trauma, children can and do recover with appropriate interventions.