| A | B |
|---|
| digestive system | breaks down food into a form usable by cells |
| circulatory system | carries oxygen and nutrients to cells and waste products away from cells |
| skeletal system | provides frame work and support |
| muscular system | allows movement |
| respiratory system | takes oxygen into body and removes carbon dioxide from body |
| excretory system | removes cell waste products from blood |
| nervous system | enables body to respond to the environment |
| endocrine system | regulates and controls life processes |
| reproductive system | produces cells which can form new organisms |
| feedback loop | a circular message pathway that sends information back and forth from one part of the body to another |
| gland | a tissue organ that releases chemical substances within the body |
| hormone | chemical substances in the body |
| pituitary gland | controls development, body growth anf the thyroid gland |
| thyroid gland | controls how cells release energy and works with parathyroid to control amount of calcium in the blood |
| parathyroids | works with calcitonin to control the amount of calcium in the blood |
| pancreas | contols the amount of glucose in the blood |
| adrenals | controls body's reaction to stress and controls salt and water balance in the blood |
| ovaries | controls femal characteristics |
| testes | controls male characteristics |
| dendrites | short branches of a nerve cell that carry messages from other nerve cells to the cell body |
| axon | long branch of a nerve cell that carries messages from the cell body to other nerve cells |
| impulse | a message that travels through a nerve cell |
| synapse | the space between two nerve cells |
| central nervous system | contains the brain and spinal cord |
| association nerve cell | a neve cell in the brain or spinal cord |
| cerebrum | part of the brain that provides for thought and voluntary muscle activity |
| cerebellum | part of the brain that control physical coordination |
| brain stem | the base of the brain that connects with the spinal cord |
| medulla | a section of the brain stem that controls involuntary muscle activities |
| hypothalamus | part of the brian that maintains body temerature and aids n digestion. Is a link to the endocrine system. |
| peripheral nervous system | all nerve cells outside the brain and spinal cord |
| sensory receptors | special cells that detect different kinds of stimuli |
| sensory nerve cells | a nerve cell that carries impulses from a sensory receptor to the central nervous system |
| motor nerve cells | a nerve cell that carries impulses from the central nervous system to muscles or organs |
| reflex | a response that occurs when impulses travel directly from a sensory nerve cell to the spinal cord to a motor nerve cell |
