Why Do the Terms Aphanitic or Phaneritic Not Apply to the Texture

question 18

Essay

Why do the terms aphanitic or phaneritic not apply to the texture of pumice or obsidian?

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Definitions:

Reciprocal Innervation

A neural circuitry mechanism that allows for coordinated muscle contraction and relaxation, ensuring smooth and efficient movements.

Arachnoid Mater

One of the three meningeal layers, situated between the dura mater and the pia mater, that surrounds and protects the brain and spinal cord.

Meninx

Refers to the membranous covering of the brain and spinal cord, collectively known as meninges.

Periosteum

The dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.