Curved sickle blade e syringe: o que têm em comum

1. Passo 1. Curved sickle blade — faz parte de — Sickle. A semicircular blade gathers the stems to the cut.
2. Passo 2. Sickle — evoluiu de — Stone tool. The first sickles had flint inserts.
3. Passo 3. Stone tool — evoluiu para — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.
4. Passo 4. Needle — faz parte de — Syringe. A hollow needle.

Abrir Evothings