The ________ supports respiration by maintaining fluids, providing immunity, and removing inhaled solid materials and microorganisms

The erector spinae muscles are located in the ___________ layer of the posterior torso

a. superficial b. middle c. deep

You have been caught in a flash flood and have underestimated the depth of the water and the strength of the current. As you float downstream, you notice a partially submerged tree in the water. Which of the following approaches should you take?

A) Relax your body and let the current carry you. B) Try to swim over to the tree. C) See if you can touch your feet on the ground to steady yourself. D) Try to dive under the tree.