What is compact bone tissue composed of?

Answer 1

Articular cartilage and bone marrow.

Compact bone is found on the outer surface of long bones. The cells (osteocytes) which make up bone are very densely packed.

The ends of long bones are called the epiphysis, the shaft is called the diaphysis.

There is articular cartilage on either ends. The long bones distally and proximally have red marrow. Red bone marrow is a place where red blood cells are made.
There is yellow marrow in the diaphysis. The yellow marrow is mostly fat and storage for needed energy.

On the surface of the bone is a periosteum which covers the endosteum. The center is called the medullary cavity.

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Answer 2

Michael Adams

Osteons, which are made up of collagen fibers, osteocytes, and central Haversian canals that house blood vessels and nerves, are the building blocks of compact bone tissue. Osteons are composed of concentric layers of mineralized matrix called lamellae.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.