What are muscles made of?

So im writing an editorial and i need understanding what this verse means from a song lyric. the editorial is about depression but i need understanding what this could mean “her feelings she hides, her dreams she can’t find. she’s losing her mind. she’s fallen behind. she can’t find her place. she’s losing her faith. she’s fallen from grace. she’s all over the place.”

Describe the flow of blood represented by the diagram. include the following terms: nutrients, artery, capillaries, vein. ( me)

What are your thoughts on nonhuman trials? do you feel that testing should be done on animals? what are the advantages and disadvantages with nonhuman trails?