The cardiac cycle consists of two phases; a period where the heart muscle is relaxed, called <u>diastole</u>, and a period of contraction, called <u>systole</u>.
These are then divided into four stages. These are;
1.<u>Ventricular Filling Period (VPF)</u>
2. <u>Isovolumetric Contraction Period (ICP)</u>
3. <u>Ventricular Ejection Period (VEP)</u>
4.<u> Isovolumetric Relaxation Period (IRP)</u>
At rest, cardiac diastole lasts for approximately 0.5 seconds, and cardiac systole lasts approximately 0.3 seconds to complete. However, during exercise, when the heart rate is increased the time period of <u>diastole</u> , especially, is reduced.
Inherited immune deficiency, it is not contagious <span />
C. aggressive
In general, those who are passive don't speak up for themselves and let others "walk over them." Someone who is assertive will speak up and set healthy boundaries for themselves, but does this in a non threatening or harmful manner.
The Ozone layer is actually located in the stratosphere in a region that is 10 to 50 km above the Earth<span>.</span>
Answer is C sun- plant-fish -bear
