The internal environment of the body is fluid, i.e. body fluids include: blood, tissue fluid, lymph. Body fluids are therefore the liquid substances found in the body of organisms. Most fluids circulate in the body of the organism, some fluids are excreted out of the body and are called waste.
The following table highlights the English words for a person’s body fluids.
| blood | sweat |
| urine | semen |
| mucus | tears |
| bile | vomit |
| saliva | gastric juices |
