The heart is enclosed in a double-walled membranous sac called___. <br/>() A: the myometrium B: the peritoneum C: the epicardium D: the periosteum E: the pericardium

What are the correct descriptions of periosteum?() A: The outer layer consists of dense connective tissue B: The inner layer contains bone progenitor cells C: Formation of perforating fibers into bone D: Participate in the repair of bone damage E: Covered on the inner and outer surface of bone

The spinal epidural space A: is located between the dura mater and arachnoid mater B: is located between the spinal dura mater and the periosteum of the vertebral canal C: with its contents can protects the spinal cord from injury D: opens into the cranial cavity through foramen magnum E: contains venous plexus and lymphatic vessels