Answer:
A brain ventricle is a cavity in the brain with an open channel leading to it.
Explanation:
The brain and spinal cord are encased and protected by three layers of tissue, all called meninges. The outermost layer is called the dura mater, and covers both the brain and spinal cord. On either side of this layer, where it crosses or penetrates into these organs, are two extensions that look like small tubes coming from under a tent. These extensions are called cranial nerves because they come out on either side of the head just below its most prominent part - hence "cranial".
Suicidal thoughts and/or actions consist of you thinking about hurting yourself, and eventually killing yourself. When you have suicidal thoughts, you might cut yourself, and feel down, but remember, if you are feeling suicidal, talk with an adult you trust, or call the suicidal hot line.
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B.Workplace air quality C.UV <span>exposure</span>
