AP01 - Histology of Nervous Tissue

pdf NAS AP01 Structure and Ultrastructure

Nervous System divided into Central and Peripheral.

Central includes brain and spinal cord. Peripheral connects receptors and effectors to the CNS.

PNS

PNS classifications: Afferent/Efferent.

• Afferent = towards CNS (sensory)
• Efferent = from CNS (motor)

12 Pairs Cranial nerves

31 Pairs Spinal nerves

Spinal Nerves

Cranial Nerves

CNS

• Grey and white matter.
• CNS tissue does NOT have collagenous supporting tissue. Only Meninges(Dura mater, Arachnoid, Pia mater. Ext→Int) for coverage. Therefore soft and vulnerable to damage.
• Brainstem
• Spinal Cord

Neurones & Glial Cells

Neurones

• 3 types; basic function and locations