What is a macro-molecule responsible for forming the main structure of muscles skin bones and tendons?

The macromolecule responsible for forming the main structure of muscles, skin, bones, and tendons is collagen. Collagen is a type of protein that provides strength and elasticity to various tissues in the body. It plays a crucial role in maintaining the structural integrity of connective tissues and is abundant in the extracellular matrix. This makes it essential for overall tissue health and functionality.