Outer most covering of brain is called :-a)Choroidb)Duramaterc)Piamaterd)ArachnoidCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Three layers of membranes known as meninges protect the brain and spinal cord. The delicate inner layer is the pia mater. The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. The outermost tough and fibrous layer is called the duramater.Hence, the correct answer is option 'B'.

Answer

Brain has three covering or meninges. the outer most layer is duramater, middle layer is arachnoid and innermost layer is piamater.thus, op B.

Answer

Correct answer is option.b

Answer

Brain is protected by bony covering and three protective membranous called meninges .
Dura Mater outer covering which is enclosed to brain box , Arachnoid mater middle layer,piamater inner layer which is enclosed to brain .
Thus option B is correct.

Answer

Brain is protected by three meninges.. duramater, piamater, arachnoidmater, and the outermost layer is Duramater.

Answer

Outermost covering of the brain is called Duramater.

The brain is a vital organ that is protected by several layers of coverings called meninges. These meninges provide support, cushioning, and protection to the delicate brain tissue. The outermost layer of the meninges is called the Duramater.

Structure of Duramater:
- The Duramater is a tough, fibrous membrane that closely adheres to the inner surface of the skull bone.
- It is composed of two layers: the outer periosteal layer and the inner meningeal layer.
- The periosteal layer is firmly attached to the inner surface of the skull bone, while the meningeal layer is in direct contact with the brain tissue.

Functions of Duramater:
1. Protection: The Duramater acts as a protective barrier, shielding the brain from external forces and potential injuries. It helps prevent the brain from coming into direct contact with the hard skull bone, reducing the risk of damage.
2. Barrier: The Duramater forms a barrier that prevents the mixing of cerebrospinal fluid (CSF) with blood. This barrier ensures that the brain and spinal cord are adequately protected and maintain their own unique environment.
3. Blood Supply: The Duramater contains blood vessels that supply oxygen and nutrients to the meninges and the outermost layers of the brain tissue.
4. Sensation: The Duramater is richly supplied with sensory nerves, allowing it to sense pain and respond to any injuries or inflammation. This sensation helps in detecting potential issues within the brain or surrounding structures.

Summary:
The outermost covering of the brain, known as the Duramater, is a tough and fibrous membrane that provides protection, forms a barrier, supplies blood, and allows for sensation. It plays a crucial role in safeguarding the delicate brain tissue and maintaining the brain's optimal functioning.

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