Liver cells, bone cells, nerve cells, and muscle cells are called `"________"`
cells.
Sperm cells and egg cells are called `"________"`

Explanation

To answer the question, we need to identify the types of cells mentioned in the question based on their functions and characteristics.

### Step-by-Step Solution:

1. **Identify the first group of cells**: The question lists liver cells, bone cells, nerve cells, and muscle cells. These cells are responsible for various functions in the body and are involved in growth and repair.

2. **Determine the classification of these cells**: The cells mentioned (liver, bone, nerve, and muscle cells) are known as somatic cells. Somatic cells are all the body cells except for the reproductive cells.

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