الدورة الكبرى: تبدأ من القلب، حيث يضخ الدم إلى الجسم، ثم يعود إلى القلب.
الدورة الصغرى: تبدأ من القلب إلى الرئتين، حيث يتم تبادل الأكسجين وثاني أكسيد الكربون، ثم يعود الدم إلى القلب.

Bodybuilding is a type of physical exercise focused on developing muscle mass and strength through resistance training. Here are some basic details about this field:

Bodybuilding began as a sport in the late 19th century, with prominent figures like Eugen Sandow, who is considered the "Father of Bodybuilding."
The sport evolved over the decades and became more popular with the organization of competitions like Mr. Olympia.