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Over [174]
3 years ago
6

Description: What are stem cells? Where do stem cells come from? Why are they important?

History
2 answers:
iren [92.7K]3 years ago
6 0
Stem cells are a class of undifferentiated cells that are able to differentiate into special cell types.
They are important because they represent an area in medicine, because they have the potential to regenerate and repair damaged tissue.
Not all stem cells come from embryos but also bone marrow, your teeth and other places.
Jlenok [28]3 years ago
6 0

Answer:

<em>What are stem cells?  </em>

They are cells found in all organisms that have more than one cell. Under appropriate conditions, stem cells divide into new cells. It can be said that they are the raw material from which all other cells are generated. These new cells become new stem cells (self-renewal) or specialized cells with a more specific function (differentiation).  

<em>Where do stem cells come from? </em>

Research has shown that there are several sources of stem cells:

  • Embryonic stem cells: come from embryos that are three to five days old.
  • Adult stem cells: are found in small amounts in most adult tissues, such as bone marrow or fat.
  • Adult cells modified to have the properties of embryonic stem cells by genetic reproduction.
  • Perinatal stem cells that are found in amniotic fluid, as well as in umbilical cord blood.

<em>Why are they important?</em>  

Researchers and doctors hope that stem cell studies can help increase understanding of how diseases occur and develop. The possibility that has arisen to generate healthy cells to replace diseased cells (regenerative medicine) is very important. Stem cells can be oriented to become specific cells that can be used to regenerate and repair diseased or damaged tissues in people.

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Ancient Greeks would frequently attend the recitals of plays such as The House of Athens. Often, the themes of the tragedies wou
skelet666 [1.2K]

Answer:

Exact Answer For Edmentum. Hope it helps :)

Explanation:

The plays that depicted tragedy in Greek mythology played an important role in the social life of ancient Greeks. The tragedies arose because of the social problems that were plaguing the ancient citizens. The tragedies helped citizens answer questions about the way one should behave in society. They also helped one understand how to accept the problems that arise in life. The myths also express the ways through which the gods would punish people if they commit hubris.

The first act of tragedy in the House of Athens is the storms that Poseidon sent to the city after losing the contest to Athena. The people pacify Poseidon by removing the women’s right to vote. In ancient Greece, men expected women to look after the household. Men would arrange marriages for their daughters, and no women could cast a vote. The play demonstrated the inequality that existed between the genders in ancient Greece.

The second tragedy that occurred in the play was the deaths of Cecrops’s daughters Herse, Pandrosus, and Aglaurus. The sisters died after disobeying the orders of the goddess Athena, ordering them not to view the child Erichthonius. The sisters disobeyed the orders and viewed the child, but his appearance scared them. The story shows the mysterious ways through which the gods work to protect humans from harm, but disobeying the gods can lead to unfortunate circumstances.

The third tragedy that struck the House of Athens was Tereus’s infidelity. Tereus seduced his wife Procne’s sister, Philomela (or sexually assaulted her). The adulterous act in itself was hubris, but Tereus also mutilated Philomela by cutting off her tongue.

The fourth tragedy was the death of Procne and Tereus’s son Itys. Procne killed and served her son to Tereus after discovering Tereus’s infidelity. Therefore, all three protagonists committed hubris, and the gods turned all three into birds. This, too, shows how Greek society viewed and reacted to adultery and cannibalism. They believed that the gods would punish the guilty in severe ways.

The fifth tragedy was Procris’s death. She died after her husband Cephalus accidentally killed her with a spear. He doubted her fidelity to him, and so he hatched a plan to find out if she was faithful. When she hesitated once, he flew into a rage and she fled in rage. She eventually forgave his indiscretion. However, soon afterward, Cephalus killed Procris with the spear she gave him. This shows how much the ancient Greeks valued fidelity and trust between husband and wife.

The sixth and final tragedy that affected the House was the sexual assault of Creusa by Apollo. The story shows that even the gods are not immune to committing hubris. A greater force will punish the gods, but they will always look after any children they have with mortals.

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