Tag: life processes in living organism

The spinal cord begins at the occipital bone and extends down to space between the first and second lumbar vertebrae. The terminal portion of the spinal cord is called the conus medularis. It is tapperd and located near the lumbar vertebrae.

The cavity or system of cavities in the interior of the vertebrate central nervous system comprising the central canal of the spinal cord and the ventricles of the brain is called as neurocoel. 

Centromere joins the microtubules of 'Chromosomal spindle fibres and helps in the movement of chromosome during cell division. Centromere also plays an important role in the polymerization of tubulin protein used in the formation of microtubules. Hence it is helpful in attaching the chromosome with spindle fibres.

The lateral ventricles are part of the ventricular system of the brain. Both cerebral hemispheres contain a lateral ventricle. The lateral ventricles are the largest of the ventricles.

The hypothalamus is located below the thalamus, just above the brainstem. It forms the ventral part of the diencephalon. 

Septum lucidum is a thin membrane of nervous tissue, that forms the medial wall of the lateral ventricles in the brain. The septum lucidum is located in the midline of the brain, between the two cerebral hemispheres. It is attached superiorly to the corpus callosum. It is attached to the anterior part of the fornix, and on either side of the structure are the two lateral ventricles. During foetal development, there is a space between the two laminae, called as the cavum septi pellucidi, which disappears during infancy. The cavum is occasionally referred to as the fifth ventricle (pseudocoel).