I've had a crush on this girl ever since 4th grade and i wanted to ask her out today. What should i say? please i need help!

Start by telling her how you feel, like what makes you like her. Almost 'flatter' her, but don`t creep her out. Then tell her you have a crush on her. It`s important to keep calm so that she doesn`t think it`s weird. It may be hard to do, but just relax. Try not to think about what her reaction is, but instead focus on how you tell her. Hope this helps, and good luck! ^^

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.