Final answer:
1) The prevertebral fascia, 2) The carotid fascia, 3) The parotid fascia
The carotid sheath is formed by the prevertebral fascia, carotid fascia, and parotid fascia.
Step-by-step explanation:
The carotid sheath is a connective tissue structure located in the neck that contains the common carotid artery, internal jugular vein, and vagus nerve. It is formed by three fascias:
- The prevertebral fascia: It surrounds the vertebral column and forms the posterior part of the carotid sheath.
- The carotid fascia: It surrounds the common carotid artery, internal jugular vein, and vagus nerve and forms the middle part of the carotid sheath.
- The parotid fascia: It surrounds the parotid gland and forms the anterior part of the carotid sheath.
So the correct answer would be options 1), 2), and 3).