1) The heart is a hollow muscular organ and is divided into four cavities, which are: a) two aorta and two pulmonary b) two atria and two ventricles c) two vena cava and two aorta 2) Capillaries which pass between the cells where the blood performs the exchange of gases, nutrients and other elements. a) Arterial capillaries b) Venous capillaries c) Continuous capillaries 3) Is an intermediate layer constituted by smooth muscle. a) The intima layer b) The middle layer  c) The adventitia layer 4) They conduct oxygenated blood a) Veins b) Arteries c) Capillaries 5) Is the outermost layer and it is formed by connective tissue. a) The intima layer b) The middle layer c) The adventitia layer 6) It starts in the right ventricle and ends in the left atrium. a) Major circuit b) Systemic circuit c) Minor circuit 7) Are responsible for capturing and transporting oxygen to all parts of the body. a) Red blood cells b) Leukocytes c) White blood cells 8) They carry deoxygenated blood a) Veins b) Arteries c) Capillaries 9) This alteration occurs when there are not enough red blood cells or hemoglobin to transport the oxygen. a) Leukemia b) Aplasia c) Anemia 10) It starts in the left ventricle and ends in the right atrium. a) Major circuit b) Pulmonary circuit c) Minor circuit 11) Any morphological or functional alteration of the heart that is present from the moment of birth is considerate a) Congenital heart disease b) Heart failure c) Myocardial infarction 12) Body´s defending cells a) Red blood cells b) Erythrocytes c) Leukocytes 13) It is the death or necrosis of a group of cells of the myocardium due to the lack of blood. a) Myocardial infarction b) Heart failure  c) Arterial hypertension 14) Is a disease in which plaque builds up inside your arteries. a) Anemia b) Atherosclerosis c) Arterial hypertension 15) Are the upper chambers of the heart, they receive blood returning to the heart from other areas of the body a) Atria b) Ventricles c) Cavities

Circulatory system

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