Investing fascia of right upper limb
Fascia membri superioris dextri · Obalová fascie pravé horní končetiny
Fascia & connective tissue
Looks like
The continuous sleeve of deep connective tissue wrapping the whole arm from shoulder to hand.
What it does
Holds muscles in place and divides them into compartments.
Keeping it well
Crush injury can cause compartment syndrome: severe pain is an emergency.