| A | B |
|---|
| chemosynthesis | process to obtain energy and produce food from inorganic compunds used by some organisms such as methane-producing bacteria |
| joint | point where two or more bones meet |
| keratin | protein formed by the outer epidermal skin layer;helps protect underlying skin cells |
| bile | breaks fat into small droplets by mechanical digestion;chemically produced by the liver and stored in the gallbladder |
| hemoglobin | iron containing molecule of red blood cells that transport oxygen and some CO2 |
| nephron | A filtering unit in the kidney |
| neurotransmitter | chemicals that diffuse across the synapses between neurons,changing the polarity of the recievingdendrite,resulting in movement of nerve impulse from neuron to neuron |
| pathogens | disease causing agents such as bacteria,fungi,or viruses |
| antibiotic | microbial or fungal product that kills or inhibits the growth of microorganisms |
| melanin | cell pigment formed by the iner epidermal skin layer; color skin and helps protce against harmful UV rays |
| stomach | pouchlike,muscular digestive organ that secretes acids and enzymes |
| esophogus | muscular tube that moves food from mouth to stomach by smooth muscle contractions |
| calorie | unit of heat used in measuring the energy content of food |
| peristalsis | waves of smooth muscle contraction in the digestive system that move food along the digestive tract |
| urine | liquid composed of excess H2O, ions, and waste molecules that is filtered from the blood by the kidneys, stored in the urinary bladder and eliminated through the urethra |
| pulse | rhythmic surge of blood through an artery |
| ventricle | thick-walled, muscular lower chambers of the mamalian heart that recieves blood from the atria and send it toward the lungs and arteries. |
| semicircular canals | fluid filled structures in the ear involved in maintaining the body's balance |
| depressant | drug that produces sedation by slowing down the activities of the central nervous system and increasing the activites of the parasumpathetic nervous system |
