Answer:
1) A cardiovascular system is an organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes.
2) "Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart."
3) A heart attack is a blockage of blood flow to the heart muscle.
First she want a dress because in her she need one for this type of affair where she would just wear it once to impress people. Basically she was just thinking about her self at this point because her husband was saving the money for a gun that he wanted but instead he got her the dress because in was more of a need.
Your paragraph is perfect except that you should not capitalize the word "mythology".
In ancient literature, heroes were usually described as males who sacrificed themselves for the benefit of others. They also held certain characteristic such as can be seen through the chivalric code. They were expected to do great deeds of glory to even be counted as a hero in their society. This is why literature such as King Arthur were so popular in their times.
Although heroism in modern can still be represented through the lens of a superhero or war hero, it is generally given a lot more lax, and usually a lot easier to obtain. Unlike in the times of the knights, most people aren't expected to slay dragons, or rescue a damsel in distress. The theme of the "everyday hero" is certainly a huge difference between the two. In modern film, heroes are usually portrayed as the average Joe, sort of character, with flaws and vices just like anyone else. Heroes are now seen as obtainable characters with decent stances of virtue.
