During the hystological study of cortical shaft, basophilic cells with developed synthesis organelles can be seen on the bone surface under the layer of fibers. These cells take part in bone tissue regeneration. What shaft layer are they located in?

Answer options

1. Osteon layer
2. Bone
3. Inner lamellae of compact bone tissue
4. Periosteum
5. Outer lamellae of compact bone tissue

Explanation

The periosteum in one is made up of osteocytes and osteoblasts( all basophilic), they are responsible for bone tissue regeneration.