Which statements are true of the bone tissue? * an osteon is a functional unit of compact bone
haversian system is another name for osteon
lacunae are small spaces within bone tissue
there is rich blood, nerve and nutrient supply to bone tissue
bone is always thick and heavy
spongy bone is mostly found along the diaphysis of a long bone

There are two types of bone tissue: compact and spongy. Compact Bone Tissue. Compact bone (or cortical bone) forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. It provides protection and strength to bones. Compact bone tissue consists of units called osteons or Haversian systems

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the answer would be d

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?