Senile plaques in Alzeihmer's diseasae are rich in-
*Pathology: neuritic plaques composed in pa of Ab amyloid, derived from amyloid precursor protein (APP); neurofibrillary tangles composed of abnormally phosphorylated tau protein. Ref Harrison20th edition pg 2567
Amyloid
Tau protein
ApoE
Neuroglia
C.N.S