The cardiac cycle is the performance of the human heart from the ending of one heartbeat to the beginning of the next heartbeat.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.
Volga River is the longest river in Europe.
It is also a source of hydroelectricity for many Russian cities along its basin
Answer:
floods, tornadoes, tsunami, storm
Venezuela is an oil producing country in south america.
Stomata<span> (the word </span>stomata<span> means "mouth") are small pores found in the leaves of the plant that helps in gaseous exchange during photosynthesis and</span>respiration<span>. </span>Stomata consist of two types of cells, the stoma or the pore and guard cells
