lt;question>What is the function of muscles?

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51.<question>What is the function of muscles?

<variant>motion, contraction✔️

<variant>metabolism

<variant>protection

<variant>removing waste materials

<variant>connecting bones

52.<question>The heart is an inner organ placed within the …

<variant>thoracic cavity✔️

<variant>head

<variant>abdominal cavity

<variant>human brain

<variant>intestine

53.<question>The main organ of cardiovascular system is …

<variant>heart✔️

<variant>lungs

<variant>brain

<variant>stomach

<variant>bladder

54.<question>The weight of the heart is about …

<variant>300 grams✔️

<variant>100 grams

<variant>500 grams

<variant>1500 grams

<variant>1000 grams

55.<question>The atria are separated from the ventricles by …

<variant>atrioventricular valves✔️

<variant>pericardium

<variant>septum

<variant>chambers

<variant>walls

56.<question>Arteries, veins and capillaries compose the …

<variant>vascular system✔️

<variant>heart

<variant>muscular structure of the heart

<variant>muscular layers of the atria

<variant>muscular layers of the ventricles

57.<question>The general circulation is formed by the …

<variant>vessels carrying blood to and from the tissues of the body✔️

<variant>vessels carrying blood to and from the lungs

<variant>veins passing to the liver

<variant>there is not correct answer

<variant>all answers are correct

58.<question>The pulmonary circulation is formed by the …

<variant>vessels carrying blood to and from the tissues of the body✔️

<variant>vessels carrying blood to and from the lungs

<variant>veins passing to the liver

<variant>there is not correct answer

<variant>all answers are correct

59.<question>The portal system is formed by the …

<variant>vessels carrying blood to and from the tissues of the body✔️

<variant>vessels carrying blood to and from the lungs

<variant>veins passing to the liver

<variant>there is not correct answer

<variant>all answers are correct

60.<question>The vessels carrying blood to the heart are called …

<variant>veins✔️

<variant>capillaries

<variant>arteries

<variant>plasma

<variant>thrombocytes

61.<question>The lungs are the main organs of the …

<variant>respiratory system✔️

<variant>nervous system

<variant>alimentary tract

<variant>cardiovascular system

<variant>urinary system

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