The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the systolic ejection phase (Option D). It is the second phase of the ventricular systole.
The cardiac cycle is a sequence of contraction and relaxation of the atria and ventricles to pump blood throughout the body.
This cycle (cardiac cycle) can be divided into two major periods: diastole and systole.
The diastole is when the heart relaxes and refills with blood, while the systole is when the heart contracts and pumps blood.
The systolic ejection phase is the second phase of the ventricular systole where blood is pumped from the ventricle.
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Answer:
Meiosis results in the production of gametes (sex cells)
The right option is ; They destroy pathogens that enter the wound
White blood cells will prevent bacteria on the glass from infecting her blood by destroying the bacteria.
White blood cells are the cells of the immune system that protects the body against infectious disease and pathogens. White blood cells are present in every part of the body including the blood. White blood cells encompass any pathogens in the blood, engulf and break them down so as to destroy them
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Answer:
It equals the number of protons and electrons.
Explanation:
On day one the levels of oestrogen and progesterone are low, having dropped quickly at the end of the last cycle. Low oestrogen level causes FSH release from the pituitary gland.
