Anatomy and physiology : designed for academies and families . l of a section of the skull bones. Thislines the interior of the skull and spinal column, and likewisesends processes inward, for the support and protection of the f J? ? £• deV,he ,0,ls ^stem consist ? What constitutes an excep-tion to this / How is the nervous system divided ? Descn&e the many membranes has it ? Describe the dura mater. What is its use? ANATOMY OF THE BRAIN. 227 different parts of the brain. It also sends processes external-ly, which form the sheaths for the nerves, as they quit theskull and spinal
Anatomy and physiology : designed for academies and families . l of a section of the skull bones. Thislines the interior of the skull and spinal column, and likewisesends processes inward, for the support and protection of the f J? ? £• deV,he ,0,ls ^stem consist ? What constitutes an excep-tion to this / How is the nervous system divided ? Descn&e the many membranes has it ? Describe the dura mater. What is its use? ANATOMY OF THE BRAIN. 227 different parts of the brain. It also sends processes external-ly, which form the sheaths for the nerves, as they quit theskull and spinal column. The dura mater is supplied witharteries and nerves. The arachnoid, or spiders web membrane, so namedfrom its extreme tenuity, is the serous membrane of the brainand spinal cord, and, is, like other serous membranes, a shutsac. It envelopes these organs and is reflected upon the innersurface of the dura mater, giving to that membrane its serousinvestment. There are no vessels in the arachnoid, and nonerves have been traced into it. Fig. Fig. 165. a, a. Represents the scalp turned down, b, b, b. The cut edge of thebones of thesku 1. c, The external strong membrane ot the brain, the dura mater,suspended bv a hook, d The left hemisphere of the brain, showing its convolutions.«, The superio? edge of the right hemisphere. /, The fissure between the two hem-lspheres. The pia mater is a vascular membrane, composed of What is one of its uses ? Describe Describe the arachnoid membrane,the pia mater. 228 ANATOMY AND PHYSIOLOGY. innumerable vessels, held together by cellular invests the whole surface of the brain, and dips into itsconvolutions. The pia mater is the nutrient membrane ofthe brain, and receives its blood from the carotid and verte-bral arteries. Its nerves are minute branches of the sym-pathetic, which accompany the branches of the arteries.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
