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Briefly Describe the Structure of the Cerebrum in Human Brain and Mention Its Functions. - Biology

Briefly describe the structure of the cerebrum in human brain and mention its functions.

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Solution

Brain consists of main three parts and lies in the cranial cavity of skull.

  1. The cerebrum
  2. The cerebellum
  3. The medulla oblongata

Cerebrum: It is very large and form two third of the whole brain. The two hemispheres are separated from each other by a deep longitudinal groove, the median fissure. The outer surface is folded with ridges and grooves. The hemispheres are hollow from inside and their walls have outer and inner portions. The outer portion has cell bodies of the neurons and it is called grey matter.
The wavery edges of the folded layer has large number of neurons to the extent of nine billion. The inner portion of the cerebrum has axons and it is called white matter.

Functions:

  1. It controls all the voluntary activities.
  2. It is the seat of intelligence, consciousness and will power.
Concept: The Central Nervous System
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APPEARS IN

Selina Concise Biology Class 8 ICSE
Chapter 7 Nervous System
Long Answer Questions | Q 2 | Page 72
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