Which of the following muscles serves as a common intramuscular injection site, particularly in infants? Naim 20:24 The Muscular System Which of the following muscles serves as a common intramuscular injection site, particularly in infants? A) the vastus intermedius B) the vastus medialis C) rectus femoris D) the vastus lateralis Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+