Which of the following statements about the structure of the heart is (are) true? ANSWER The structure of the atrioventricular and semilunar valves helps to ensure that blood flows in only one direction through the heart and the innermost layer of epithelial cells, the endothelium, lines the inside of the entire cardiovascular system. The left ventricular wall is thicker than the right. The structure of the atrioventricular and semilunar valves helps to ensure that blood flows in only one direction through the heart. All of the listed responses are correct. The innermost layer of epithelial cells, the endothelium, lines the inside of the entire cardiovascular system.

it would be rhyolitic hope this

ans.

in united states (us), the first leading cause of death for both women and men is heart diseases that leads to more than half of the deaths. heart diseases develop due to narrow arteries, buildup of plaque in blood capillaries that arises difficulties in blood flow.

the second leading cause of deaths in us is cancer that affects individuals of all ages. it develops due to uncontrolled growth and spread of tumor cells, which results in death if the not controlled or treated.

the third leading cause of deaths in us is copd or chronic obstructive pulmonary disease. it includes difficulty in breathing, chest infections, and persistent cough. smocking is a leading cause of copd and around 80% of copd deaths occur due to smoking.

thus, the correct answer is 'option). cancer, copd, and heart disease.'