Презентация на тему: "Сердце"
презентация к уроку на тему

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The Circulatory System 1) Heart 2) Vessels : a) arteries b) veins c) capillaries

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The heart The heart is an inner hollow muscular organ placed within the chest, immediately behind the breast bone, and included in the pericardium.

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The pericardium The pericardium releases some fluid which reduces the friction of the heart .

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The base of the heart is against the third rib. Its apex is against the interspace between the fifth and sixth costal cartilages. The weight of the heart is about 300 grams in the male and 220 gr in the female.

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The structure of the heart

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The heart consists of two separate chambers divided by the septum. Each of the chambers has two connected parts: the atrium and the ventricle. The atrio - ventricular valves separate the atria from the ventricles.

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The right atrium The right ventricle The left atrium The left ventricle The septum

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The right atrium is larger than the left one, but the walls of the left atrium are thicker than those of the right one. The right ventricle is triangular ( треугольный ) in form and has thick walls. The left ventricle is longer and more conical. The walls of the left ventricle are three times as thick as the walls of the right one. The valves are located at the entrance and exit ( выход ) of each ventricles.

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The muscular structure of the heart consists of two parts - the muscular layers of the atria and the muscular layers of the ventricles.

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The function of the heart is to circulate the blood round the body . Naturally it acts as a pump .

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Translate into English: 1) полый мышечный орган 9) основание сердца 2) верхушка сердца 10) пространство 3) состоять из 11) правое предсердие 4) левый желудочек 12) толстые стенки 5) в три раза толще 13) располагаться 6) мышечный слой 14) циркулировать 7) действовать как насос 8) непосредственно за грудиной

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Answer the questions on the text 1 ) What is the heart? 2 ) Were does the heart lie? 3 ) The heart weights about 300 gr in the male, doesn’t it? 4 ) How many chambers does the heart consist of ? 5 ) What valves separate the atria from the ventricles? 6 ) Which of the atrium is larger left or right? 7 ) How thick are the walls of the left ventricle? 8 ) Where are the valves located? 9 ) What is the function of the heart? 10 ) What have you learnt from this text?

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The end