Explain what bone is composed of and which cells break down and replace bone tissue.

Bones are composed of mainly collagen fibre and osteoclast are the cells used to breakdown bone tissue and osteoblast cells replace it.

Explanation:

Bone is made up of tough matrix which contains mainly collagen fibres which provide bone it's flexibility and strength. The deposition of calcium over collagen makes bones more strong. Blood vessels and fat deposits are also parts of a bone.

Osteoclasts are the cells which are specialized for degenerating old bone tissue and osteoblast are the cells which make new bone tissue and replace it from old bone tissue. This process is called bone remodeling.

i25.9

chronic ischemic heart disease, unspecified

i25.9 is a billable/specific icd-10-cm code that can be used to indicate a diagnosis for reimbursement purposes.

explanation:

5. method

15. communicate, transport

18. component

21. learn

22. preceding

23. display

24. area

25. anomalous, unusual, unconventional