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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Mitochondria is the powerhouse of the cell. Only thing I remember from middle school science
Answer: The peripheral nervous system.
Explanation: We have two parts to our nervous system. The central nervous system and the peripheral nervous system. The CNS is located in the brain and spinal cord the PNS is the nerves and ganglia outside of those.
Wasps laying eggs inside hornworms and after the eggs hatch, the wasp larvae feed on the hornworm is the example of parasitism.
Explanation:
There are five types of relationships in an ecosystem. One of the relationships is parasitism. When we define ecosystem, we talk about the kind of interaction that there is between two or more different species.
Parasitism is the type of interaction between two species, in which one species, most likely a parasite, latches itself onto the other species. That other species then becomes a host to the parasite. After latching itself, it becomes dependent on it's host for resources like food and shelter. But, in this type of relationship, the host species is harmed for resources while the parasite species gains strength over time.
