Презентация, доклад на тему ОГСЭ.03 Английский язык Презентация по теме Сердце

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ОГСЭ.03 АНГЛИЙСКИЙ ЯЗЫК
ПРЕПОДАВАТЕЛЬ НИКОЛЬСКИЙ А.А.

center of the chest cavity and shifted somewhat to the left. Its weight is about 250-300 g.

The heart has four chambers – two Atria and two ventricles. Between the Atria and ventricles located butterfly valves, and the output from the ventricles into the arteries – the semilunar valves. Muscular wall of the ventricles much thicker than the walls of Atria.

outer layer (epicardium) – consists of connective tissue. The middle layer (myocardium) – a powerful muscle layer. The inner layer (endocardium), the inner epithelial layer.

The ventricles are relaxed, the flap valves are open, semilunar valves closed. The blood from the Atria flows into the ventricles.

2. Contraction (systole) of the ventricles.
Lasts about 0.3 s. The Atria are relaxed, the flap valves are closed, semilunar valves are open. The blood from the ventricle enters the pulmonary artery and aorta.

0.4 s. Butterfly valves are open, semilunar valves are closed. Blood from the veins enters the Atria and flows partly into the ventricles

The optimum mode of work of heart:
the Atria work with the rest 0.1 and 0.7, and the ventricles work 0.3 s and 0.5 s. rest

Сardiac cycle

part of the right atrium, between the confluence of the upper and lower Vena cava.
Atrioventricular node— located near the septum between the Atria and ventricles

Automaticity – the ability of the heart to contract without external stimuli is influenced by impulses that arise in him.
Automaticity of the heart muscle provides the order of phases of the cardiac cycle.

nervous system weakens the heart

Humoral regulation of heart activity is provided by the substances circulating in the blood

ions

Inhibit the functioning of the heart
acetylcholine; potassium ions;

Nervous and humoral regulation is a common mechanism of regulation of work of heart. Intensity changes of the heart, the frequency and strength of cardiac contractions under the influence of impulses coming from the CNS and blood of biologically active substances. The sequence of the phases of the cardiac cycle does not change.

clinical practice. Editor-in-chief, Susan Standring (40th ed.). London: Churchill Livingstone. 2008. ISBN 978-0-8089-2371-8.

https://en.wikipedia.org/wiki/Human_body

2016. ISBN 978-0-07-182510-8. Ganong's Review of Medical Physiology.