The human cardiovascular system is considered closed because

The first muscles to develop in babies are those in the a. neck. b. trunk. c. arms. d. legs.

Write a personal plan that can be used to reduce or prevent injury. identify the hazards you would like to prevent from occurring. include strategies in your plan that can be used to address peer pressure and other influences (both internal and external). use valid research sources to create your personal plan.

True or false mucous membranes destroy pathogens on the outer body surface, at body openings.