Examlex
Match each item with the correct statement below.
-what keeps a light ray inside an optical fiber
Autonomic Neurons
Nerve cells that control involuntary functions of the body, such as heart rate, digestion, and respiratory rate.
Adrenal Medulla
The inner part of the adrenal gland that secretes adrenaline and noradrenaline, hormones involved in the body's stress response.
Mesoderm
The middle layer of an embryo in early development, from which most of the body's tissues and structures are derived, including muscle, bone, and the circulatory system.
Ectoderm
The outermost of the three primary germ layers in the embryo, giving rise to the nervous system, skin, and various other tissues and organs.
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