Our endocrine system receives terror messages from our eyes, which can then affect other systems. Moreover, being afraid of anything might cause us to scream, stop breathing, close our eyes, and do other things.
The tapetum lucidum, an iridescent, reflective layer on the choroid that is present in many animals including the cow, deer, and cat, aids in light reflection.
Typically, the circulatory, respiratory, muscular, and digestive systems are covered in primary school.
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