The cervical nerves originate at the? {Ans: spinal cord}central nervous system {Ans: controls consciousness and many mental activities, involuntary functions of the five senses (seeing, hearing, feeling, smelling and tasting)}Platysma {Ans: broad muscle extending from the chest and shoulder muscles to the side of the chin. It is responsibel for lowering the lower jaw and lip.}ulnar nerve {Ans: Sensory-motor nerve that, with its branches, affects the little-finger side of the arm and palm of the hand.}Blood is composed of {Ans: plasma, red blood cells, white blood cells, platelets}Lymphatic and immune systems are closely connected in that they {Ans: protect the body from disease by developing resistance to pathogens and destroying disease-causing microorganisms}