| A | B |
|---|
| tissue | A group of cells |
| homeostasis | The process by which an organism's internal environment is kept stable |
| cell | Basic unit of structure and function |
| nerve tissue | Carry messges back and forth between the brain and the body |
| skeletal system | Make blood cells |
| respiratory and circulatory systems | Systems that help deliver oxygen to body cells |
| muscle tissue | Tissue that can contract and then return to original length |
| cardiac muscle | Muscle tissue found only in the heart. |
| calcium an phosphorus | Minerals stored in the bones |
| villi | Structures in the small intestine that allow large amounts of nutrients to be stored |
| involuntary muscle | Muscles that control digestion |
| Function of the skin | Keeps microorganisms outside the body. |
| vertebrae | The bones that form the backbone |
| large intestine | Organ that absorbs water from undigested food. |
| saliva | Enzyme that begins chemical digestion in the mouth |
| peristalsis | Process that involves muscle contractions that move food through the esophagus. |
| arteries | Vessiels that carry blood AWAY from the heart |
| water | The nutrient that is needed in order for all processes to take place |
| bile | A substance produced in the liver that breaks up fat |
| small intestine | Organ where most of the nutrients are absorbed. |
| diphragm | Done-shaped muscle that plays an important role in breathing |
| alveoli | Where gas exchange occurs in the respiratory system |
| valve | Stuctures that jprevent blood from flowing backward |
| Function of the excretory system | Collect and remove wastes |
| urinary bladder | Stores urine |
| function of the nose | Warms, cleans, and moistens air |
| capillaries | Vessels where materials are exchanged between blood and body cells |
| nephrons | Tiny filtering structures where urine is produced in the kidneys |
| epiglottis | Small flap of tissue that seals off the trachea |
| bronchi | Parts of the respiratory system that divide into smaller and smaller tubes |
| function of the kidneys | Eliminates urea and excess water |
| axon | Part of a neuron that carries nerve impulses away from the cell body |
| hormones | Chemical products that act on the body in the endocrine system |
| synapse | The space between an axon and the next structure |
