The cotton gin took the seeds out of the cotton fibers, and made it much easier to supply cotton, than people picking them out. It saved time, and energy. :)
Hope this helps!
A person may be resuscitated and suffer little damage if his or her heart has stopped beating and breathing has stopped for as long as <u>5 minutes.</u>
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<u>What is a heartbeat?</u>
- A heartbeat is a two-part pumping action that takes about a second.
- As blood collects in the upper chambers (the right and left atria), the heart’s natural pacemaker (the SA node) sends out an electrical signal that causes the atria to contract.
- This contraction pushes blood through the tricuspid and mitral valves into the resting lower chambers (the right and left ventricles).
- This part of the two-part pumping phase (the longer of the two) is called diastole.
- The second part of the pumping phase begins when the ventricles are full of blood.
- The heart does not work alone as brain tracks the conditions around us—climate, stress, and level of physical activity—and adjusts our cardiovascular system to meet those needs.
- The human heart is a muscle designed to remain strong and reliable for a hundred years or longer.
- By reducing the risk factors for cardiovascular disease, we may help the heart stay healthy longer.
To know more about heart beat , refer:
brainly.com/question/11245663
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Ok what is for civics that ur looking for