Answer:
I would be the extension of the trunk
Explanation:
The erector spinae muscle extends the vertebreal column. [1] It is formed of 3 muscles and its fibers run more or less vertically throughout the lumbar, thoracic and cervical regions. It lies in the groove to the side of the vertebral column. In cervical region it is covered by nuchal ligament and in thoracic and lumber region by thoracolumbar fascia.
The integumentary system is composed of skin and other appendices such as nails and hairs. In the integumentary system there are several connections with the endocrine system.
I had a lab and she had 6 pups all together but only 5 survived.