The definition of the word matrix can be applied to the organelle known as mitochondria given that the mitochondria have what is known as a "mitochondrial matrix".
The mitochondria are amongst the most important organelle of a cell. They are responsible for the production of energy molecules in the form of ATP. The basic structure of mitochondria consist of:
<em>Outer membrane</em>
<em>Intermembrane space</em>
<em>Inner membrane </em>
<em>Matrix</em>
<em>Granules</em>
and contain even more elements within.
The inner membrane of the mitochondria surrounds the matrix, giving it the form of a <u><em>pattern </em></u><u><em>of </em></u><u><em>lines </em></u><u><em>that bend and curve, leaving spaces in between.</em></u> The similarity between this shape and the definition that is given of the word "<em>matrix</em><em>"</em>, explains why this structure may have been given the name of the mitochondrial matrix.
Explanation: The endocrine system secretes hormones into blood and other body fluids. Hormones provide feedback to the brain to affect neural processing. Reproductive hormones affect the development of the nervous system. The hypothalamus controls the pituitary gland and other endocrine glands.