Hole's A&P Ch. 11.1

The central nervous system (CNS) consists of the ________ and spinal cord.

The brain includes two cerebral hemispheres, the _____________, the brainstem, and the cerebellum.

The brain contains about 100 billion _____________ neurons with countless branches of axons by which these neurons communicate with each other and with neurons elsewhere in the nervous system.

Bones, membranes, and fluid surround the organs of the CNS. The brain lies in the cranial cavity of the skull, and the spinal cord occupies the vertebral canal in the vertebral column. Beneath these bony coverings, membranes called _________, located between the bone and the soft tissues of the nervous system, protect the brain and spinal cord.

The brain connects to the spinal cord through the ___________.

Axons conducting sensory impulses up to the brain are bundled in ​ (a)   tracts. Those conducting motor impulses down through the spinal cord are in ​ (b)   tracts.

• ascending
• descending
• cardiopulmonary
• recessive
• dominant

Identify the missing structures in this image.

a

b

c

d

e

cerebrum

meninges

cerebellum

tentorium cerebelli

spinal cord

Identify the missing structures in the image.

a

b

c

d

e

f

bone (skull)

subarachnoid space

cerebrum

meninges

arachnoid granulation

skin

Identify the missing structures in the image.

a

b

c

d

e

f

g

arachnoid m.

falx cerebri

white matter

gray matter

subcutaneous tissue

pia m.

dura m.