Answer:
Tissue
Tissue is the group of similar cells that are common in origin to perform particular function. Tissue system is the group of similar tissues that are common in origin and perform particular function. Organs are made up of tissue system.
Explanation:
I'll say C, Science cannot answer difficult question...let me know.
Answer:
Neurons
Explanation:
Neurons are specialized cells, found in the nervous system, which transmit information.
Neurons contain a dendrite, a soma, and an axon. Some axons are covered with a fatty substance known as the myelin sheath, which surrounds the axon, acting as an insulator and allowing faster transmission of the electrical signal.
I used this site, please read it over whenever you are free.
https://opentextbc.ca/introductiontopsychology/chapter/3-1-the-neuron-is-the-building-block-of-the-nervous-system/#:~:text=Neurons%20are%20specialized%20cells%2C%20found,transmission%20of%20the%20electrical%20signal.