central nervous system
The______consists of the brain and spinal cord.
The______is the largest and most complex part of the nervous system
The brain includes two______, the diencephalon, the brainstem, and the cerebellum.
The brain includes two cerebral hemispheres, the______, the brainstem, and the cerebellum.
The brain includes two cerebral hemispheres, the diencephalon, the______, and the cerebellum.
The brain includes two cerebral hemispheres, the diencephalon, the brainstem, and the______.
The______connects the brain and spinal cord and allows two-way communication between them.
The______provides two-way communication between the central nervous system and the peripheral nervous system.
cranial cavity, vertebral canal
The brain lies within the______of the skull and the spinal cord occupies the______.
______are located between the bone and the soft tissues of the nervous system and protect the brain and spinal cord.
The______have three layers.
The outermost layer is the______and is composed of tough, white, dense connective tissue.
Dural sinuses are channels in______.
Denticulate ligaments are bands of______that attach spinal cord to dura mater.
The______is between the dural sheath and the bony walls of the spinal cord and contains blood vessels.
The______is thin, weblike membrane that lacks blood vessels and is located between the dura and pia maters.
The______is between the arachnoid mater and pia mater and contains a fluid called cerebrospinal fluid.
The______is very thin and contains many nerves and blood vessels.
The______is attached to the surfaces of the brain and spinal cord.
______are interconnected cavities and are located within the cerebral hemispheres and brain stem.
The ventricles are continuous with the______of the spinal cord and are filled with cerebrospinal fluid.
The largest ventricles are the______which are located in the cerebral hemispheres.
The______is located in the midline of the brain beneath the corpus callosum.
The______is located in the brainstem just in front of the cerebellum.
The______is a connection between the third and fourth ventricles.
The______is a specialized mass of capillaries and functions to secrete cerebrospinal fluid.
Most of the cerebrospinal fluid arises in the______and circulates into the third ventricle, fourth ventricle, the central canal of the spinal cord, and the subarachnoid space.
______is continuously absorbed into the blood.
______are tiny, fingerlike structures that project from the subarachnoid space into the dural sinuses.
______is different from blood in that it contains a greater concentration of sodium and lesser concentrations of glucose and potassium.
The functions of cerebrospinal fluid are to help maintain a stable______in the CNS, and provide a pathway to the blood for wastes.
Because______completely surrounds the brain and spinal cord, it protects them by absorbing forces that might otherwise jar and damage them.
The brain includes about one hundred billion______and countless branches of the axons (nerve fibers) by which these neurons communicate with each other.
The______contains many blood vessels and nerves.
The______attaches to the inside of the cranial cavity and forms the internal periosteum of the surrounding skull bones.
In some regions, the______extends inward between lobes of the brain and forms supportive protective partitions.
In some regions, the______splits into two layers, forming channels called dural sinuses.
Venous blood flows through the______as it returns from the brain to vessels leading to the heart.
The______terminates as a blind sac at the level of the second sacral vertebrae, below the end of the spinal cord.
The______contains blood vessels, loose connective tissue, and adipose tissue that pad the spinal cord.
The______spreads over the brain and spinal cord but generally does not dip into the grooves and depressions of their surfaces.
Many thin strands extend from the______undersurface and are attached to the pia mater.
The______follows the contours of the brain and spinal cord contours, passing over the high areas and dipping into the depressions.
The third ventricle communicates with the lateral ventricle through the______.