What at the main parts of blood and a function for each?

plasma, red blood cells, white blood cells, and platelets

Explanation:

PLASMA: The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it.

RBC: The main job of red blood cells, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs.

WHITE BLOOD CELLS:They flow through your bloodstream to fight viruses, bacteria, and other foreign invaders that threaten your health.

PLATELETS: a component of blood whose function is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.

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americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.