When epiphyseal plates close, the skull sutures become solid the blood supply to the myocardium is stopped the thymus atrophies the long bones cease growth

When epiphyseal plates close, the long bones cease growth.

Here's the step by step explanation:

1. Epiphyseal plates, also known as growth plates, are areas of active, new bone growth near the ends of long bones.

2. As a person grows, these plates are responsible for the lengthening of bones.

3. Once a person reaches their full adult height, these epiphyseal plates close or harden.

4. This closure is due to the replacement of the cartilage in the plates with bone.

5. Once the epiphyseal plates are fully closed, long bones stop growing in length.

6. This typically happens in late adolescence or early adulthood.

7. Therefore, when epiphyseal plates close, the long bones cease growth.

The other options mentioned (the skull sutures becoming solid, the blood supply to the myocardium being stopped, the thymus atrophying) are not directly related to the closure of the epiphyseal plates.