With the aid of a well labelled diagram describe the structure of the human heart

answer:

as a central part of the circulatory system, the heart is primarily responsible for pumping blood and distributing oxygen and nutrients throughout the body. normally, a good-functioning adult heart could go on three cardiac cycles or 72 beats per minute (google)

explanation:

dz nuts.   eeneneneeenenne

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).