What bony structure is naegeleria fowleri able to pass through to the CNS
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Step 1: Naegleria fowleri is a free-living amoeba that typically enters the human body through the nasal passages, often when contaminated water is inhaled. Show more…
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Anastasia T.
PRE-LAB 16: CNS PROTECTIVE COVERINGS PROTECTIVE STRUCTURES OF THE CENTRAL NERVOUS SYSTEM (CNS) The central nervous system (brain and spinal cord) are protected by bones that surround the organs, meninges (3 layers of connective tissue), and cerebrospinal fluid (a liquid secreted by the ependymal cells, a type of neuroglia you learned about in the previous lab). 1. List the bones that protect the organs of the CNS. You may wish to refer back to the Axial Skeleton in Chapter 6 of your textbook. Identify these bones on the available skulls and vertebral columns. Region of the CNS | Bones that Protect this Region Spinal Cord | *There are 24 bones! Brain | *There are 8 bones! 2. The Meninges a. Read about the Spinal Meninges on p. 361 & 364, and the Cranial Meninges on pp. 406-409. Complete the following table comparing and contrasting the structure and function of each of the meninges. | | Structure and Function in the Spine | Structure and Function in the Brain | Dura mater | | | | Arachnoid mater | | | | Pia mater | | |
Sri K.
The nervous system originates from the sides of which fold over to form the neural tube. The anterior end of this structure thickens to become the brain, while the posterior end remains tubular and becomes the spinal cord. The anterior end becomes folded because it cannot grow beyond the skull. The fluid-filled cavities within this structure are called ventricles and developing neurons in the layer adjacent to them. The neurons then migrate to other layers using structures called radial glial cells as guides. Eventually, they aggregate with other neurons with similar functions.
Sulav P.
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