मराठी

The Human Brain

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Topics

  • Definition: Meninges
  • Definition: Meningitis
  • Key Points: Human Brain
CISCE: Class 10

Definition: Meninges

The brain is protected by 3 membranous coverings called meninges (meninx: membrane) which continue backwards on the spinal cord.

CISCE: Class 10

Definition: Meningitis

Inflammation of the meninges is called meningitis.

CISCE: Class 10

Key Points: Human Brain

  1. The human brain is the largest in proportion to body size among all animals and is protected inside the cranium.
  2. The adult brain weighs about 1.35 kg, makes up about 2% of body weight, and is 80% water.
  3. The brain uses more than 25% of the total oxygen taken into the body.
  4. It is covered by three protective membranes called meninges: dura mater, arachnoid, and pia mater.
  5. The space between the meninges contains cerebrospinal fluid (CSF), which cushions the brain and also fills the brain’s ventricles and the spinal cord canal.
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