Chapter 6 The Circulatory System | General Biology 2
Chapter 6 The Circulatory System
Instructor: Sabri M Naser
Instruction Year: 2021 (Second Semester)
The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, dubbed systole
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