| Answer | Crossword Clue |
|---|---|
| EMBRYO | Human's early life stage |
| EMBRYO | Human's earliest life stage |
| EGG | Early life stage. |
| EYES | They stay the same size throughout a human's life |
| schistosome | A parasitic flatworm that needs two hosts to complete its life cycle. The immature form infests freshwater snails, and the adult lives in the blood vessels of birds and mammals, causing bilharzia in humans |
| schistosomes | A parasitic flatworm that needs two hosts to complete its life cycle. The immature form infests freshwater snails, and the adult lives in the blood vessels of birds and mammals, causing bilharzia in humans |
