Fhs121 Summer School- Cardiovascular System

Explanation
Apex (tepe) aşağıda, base (taban) yukarıda. 

Explanation
The statement is true because the four pulmonary veins carry oxygenated blood from the lungs back to the heart. Oxygenated blood is typically found in arteries, so the presence of arterial blood in the pulmonary veins is correct.

Explanation
Auricle (Auris-Latince kulak; auricle kulakçık) sağ ve sol atriumların öne doğru uzantısı. Ekstra boşluk oluşturuyorlar. Bkz: Şekil

Explanation
The aortic valve is best heard over the medial end of the second right intercostal space. This is because the aortic valve is located in the second intercostal space on the right side of the sternum, specifically at the medial end. By placing the stethoscope in this location, healthcare professionals can listen to the characteristic sounds produced by the aortic valve, such as the closing of the valve during systole. Therefore, it is true that the aortic valve is best heard over the medial end of the second right intercostal space.

Explanation
The first heart sound (S1) is indeed produced by the contraction of the ventricles and the closure of the tricuspid and mitral valves. This sound occurs at the beginning of systole when the ventricles contract to pump blood out of the heart. As the ventricles contract, the tricuspid and mitral valves close, preventing blood from flowing back into the atria. The closure of these valves creates the first heart sound, which can be heard as a "lub" sound. Therefore, the statement is true.