Nutrient deficiencies or toxicities in early oral development can result in permanent damage to the developing oral structures

A young boy has an open chest wound to the left lateral area after falling off of his bike onto a metal spike in the ground. His family is present and very upset and crying. As an EMT, you recognize that in this situation, your primary focus is:

A) controlling pain. B) maintaining oxygenation. C) providing emotional support. D) preventing potential wound infection.

Number 1 in the figure is the _______________ muscle.