The correct answer is "neurons".
Neurons are nerve cells which connect to each other using synapses and form neural networks. They exhibit high levels of specialization and are the primary components of the central nervous system.
Myofibrils are contractile fibers which form the striated muscle cells. Sarcomeres are the structural unit of the myofibrils.
When people say words hurt is bc your feelings com from your brain and when you feel hurt or sad your brain makes the feeling physical. Like if you are depressed then your brain makes you sleep a lot so that you don't have to feel that pain during the day. Also, people can die from a broken hart bc it isn't your physical hart that is feeling everything it is actually your brain so it makes it self sabotage.
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