Name 2 structures in your body that don't need O2 to live

Warming up prepares the body for exercise in what way? a. muscularly b. cardiovascularly c. neurologically d. all of the above

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Which area of the brain controls the body's ability to fight off stress? question 1 options: synapse, frontal lobe, dendrite, sympathetic nervous system