等同番學既星期五

好好好眼瞓呀 除左無覺好瞓 仲要一早起身溫BIO
不過朝頭溫書既感覺 真係好好
唯一美中不足既係...我阿嫲係咁同我講野...
我真係好憎人地係我好專心個陣騷擾我咖嘛 唔理邊個都係
不過 好彩我沈得住道氣 哈哈哈
既然我咁專心 點解仲要騷擾我wor
When the atria contract,the pressure in atria is higher than the pressure in ventricle.
The bicuspid/tricuspid valves will be opened.
When the ventricle contract,the pressure in ventricle is higher that the pressure in atria.
The bicuspid/tricuspid valves are closed to prevent the backflow of blood into the atria when the ventricle contract.It produced 'dub' sound.
When the ventricle relax,the pressure in aorta or pulmonary artery is higher than the pressure in ventricle.
The semi-lunar valve will be opened.
The heart tendon is prevent from overturning...
哈哈哈~寫寫下去左睇鬼故XDD 唔背住...

係bor 我講緊今日有咩發生咖嘛...
其實係冇野發生-____-
只不過係BIO補課3個鐘 CHEM補課2個鐘
真係同番學無乜分別#SO BAD#
不過至少我無浪費我D寶貴既時間=)
放左學都成3點幾 就去左圖書館
估唔到行行下 就行左個幾鐘 獲益良多呀下XDD

Facing me please=)