| A | B |
|---|
| Circulatory System | transports oxygen, nutrients, and cell wastes |
| Endocrine System | breaks down foods into a form the body can use |
| Immune System | defends the body against pathogens |
| Nervous System | controls body movement, thought, and behavior |
| Respiratory System | provides the body with oxygen and removes gas wastes from the blood |
| neuron | nerve cell that carries messages throughout the body |
| gland | an organ in the endocrine system that produces a chemical |
| hormone | a substance released by an endocrine gland that controls some of the body's functions |
| alveoli | tiny sacs in the lungs at the end of bronchioles |
| antibody | chemicals produced by white blood cells that kill specific pathogens |
| esophagus | smooth muscles in the esophagus push food toward the opening to the stomach |
| small intestine | tiny fingerlike projections called villi, line the small instesting and helps digested food move into the blood |
| gallbladder | bile produced by the liver is stored here until it is released to the small instestine |
| pancreas | produces enzymes that neutralize stomach acid |
| pathogen | an organism that causes disease |
| excretory system | removes waste from the blood |
| muscular system | allow body movement and movement of substances within the body |
| reproductive system | produces sex cells and offspring |
| impulse | a message that travels across a neuron and from one neuron to another |
| skeletal system | provides body protection and support;interacts with muscles to allow movement |
| enzymes | chemicals that help break down food into nutrients during digestion |
| brain stem | maintains blood pressure, heartbeat, respiration, and digestion |
| cerebellum | controls balance, and posture, helps fine-tune movements |
| cerebrum | interprets information that senses gather; controls muscle movement, thinking, and language |
| pituitary gland | controls development and body growth |
| thyroid | controls how cells release energy |
| parathyroid | controls the amount of calcium and phosphorous in the blood |
| adrenals | controls the body's reaction to anger, fright, or fear |
| pancreas | controls the amount of glucose in blood |
| ovaries | control female characteristics and the menstrual cycle |
| testes | control male characteristics |
