Structures
the outer, thinner layer of skin
epidermis
involuntary muscles located in such places as intestines and blood vessels
Smooth muscles
the division of the brain that connects the spinal cord to the brain
Brain stem
the bones of the skull, sternum, ribs, and vertebrae
Axial skeleton
nerve cells that are the functional and structural parts of the nervous system
sensory neurons
Neurons
the inner, thicker layer of skin
dermis
voluntary muscles attached to bones that cause body movement
Skeletal muscles
ductless glands that secrete hormones into the bloodstream
Endocrine glands
the bones of the shoulders, arms, hands, hips, legs, and feet
Appendicular skeleton
nerve cells within the brain and spinal cord that relay impulses from sensory neurons to motor neurons
Interneurons
glands that produce an oily secretion called sebum and that are connected to hair follicles
Sebaceous glands
muscles that bend a limb
Flexors
the gland that is situated at the bases of the brain and that regulates other endocrine glands; the master gland
Pituitary gland
a strong, flexible material that allows for smooth movement in joints, supports the nose and ears, connects the ribs to the sternum, and acts a cushion between adjoining vertebrae
Cartilage
nerve cells that carry impulses from interneurons within the brain and spinal cord to muscles and glands
Motor neurons
glands that secrete perspiration through ducts to pores on the surface
Sweat glands
muscles that straighten a limb
Extensors
the glands loathed on the loves of the thyroid gland and that regulate the body’s calcium and phosphorous balance
Parathyroid glands
strong bands or cords of tissue that connect bones to bones at a joint
Ligaments
the largest, most complex part of the brain, consisting of the right and left hemispheres, that controls muscular activity and receives sensory input
Cerebrum
a small picket that holds the hair root in the dermis
Follicle
striated tissue that from the walls of the heart
Cardiac muscle
glands responsible for secreting hormones that help maintain the body’s sodium and water balance, affect metabolism, and cope with stressors
Adrenal glands
bands of fiber that connect muscles to bones
Tendons
the part of the brain that functions as a center for the coordination of skeletal muscle movement
Cerebellum