Here's a breakdown:
* Matrix: This is the part of the nail where the nail cells are produced.
* Free edge: This is the visible part of the nail that extends beyond the fingertip.
The growth rate can vary depending on factors like:
* Age: Nails grow slower as you get older.
* Health: Illnesses or nutritional deficiencies can slow nail growth.
* Genetics: Some people naturally have faster-growing nails than others.
* Pregnancy: Nail growth can accelerate during pregnancy.
* Exposure to certain chemicals: Some chemicals can damage the nail matrix and slow growth.
Note: If you notice a sudden change in your nail growth rate or appearance, it's important to consult a doctor to rule out any underlying medical conditions.