what muscle extends from the chest and shoulder to the side of the chin... it's responsible for lowering the lower jaw and lip?
what muscle extends along the side of the neck from the ear to the collarbone... acts to rotate the head from side to side and up and down?
what muscle is located beneath the frontalis and orbicularis oculi... it draws the eyebrow down and wrinkles the forehead vertically?
what muscle is the ring of the eye socket, it closes the eye?
what muscle lowers the eyebrow and causes wrinkles across the bridge of the nose?
what muscles turn the hand inward so that the palm faces downward?
what muscle rotates the radius outward and the palm upward?
there are ______ nerve cells, known as neurons in the body.
over a 100 billion
_______ consists of the brain, spinal cord, spinal nerves, and cranial nerves. It controls consciousness and many mental activities, voluntary funtions of the five senses and voluntary muscle action including all body movements and facial expressions.
central nervous system
what is the primary structural unit of the nervous system... it is composed of a cell body and nucleus; dendrites and an axon?
what is the chief sensory nerve of the face, and it serves as the motor nerve of the muscles that control chewing?
fifth cranial nerve
what are the three branches of the fifth cranial nerve?
opthalmic mandibular maxillary
what controls the steady curculation of the blood through the body by means of the heart and blood vessels?
what carries waste and impurities away from cells and protects the body from disease?
what is a group of specialized glands that affect the growth, development, sexual activities, and health of the entire body?
what is responsible for changing food into nutrients and waste?
what is responsible for purifying the body by eliminating waste matter?
what includes the ovaries, uterine tubes, uterus, and vagina in females... the testes, prostate gland, penis, and the urethra in males... it produces estrogen for women and testosterone for men.