You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The deepest layer of cervical fascia is: and explain in detail?
The arrangement of layers from outside to inside is:
a. Pretracheal fascia b. Investing fascia c. Prevertebral fascia
The prevertebral fascia extends medially behind the carotid vessels, where it assists in forming their sheath and passes in front of prevertebral muscles.