Heart tissue is supplied with nutrients primarily by diffusion from the heart chambers through the myocardium.

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Which statement is true about common childhood infectious disease? a. children should always be given antibiotics to treat an infectious illness. b. frequency of infectious illnesses usually increases as children grow older. c. having a minor infectious illness weakens a child's immune system. d. infectious illnesses are usually mild and require no medication.

Children's reactions to divorce often include which of the following groups of behaviors? a. resentment, anxiety, guilt, and anger b. joy, relief, and happiness c. talking too much and desiring dramatic play d. attachment to adults and seclusion from other children