Autonomic Nervous System

¥Preganglionic neuron §cell body in brain or spinal cord §axon is myelinated type B fiber that extends  to autonomic ganglion ¥Postganglionic neuron §cell body lies outside the CNS in an  autonomic ganglion §axon is unmyelinated type C fiber that  terminates in a visceral effector ¥The output (efferent) part of the ANS is divided into two principal...

Stratified Epithelial Tissue

Stratified Squamous epithelium - keratinized §Formed of multiple layers of cells. The topmost layer is formed of squamous cells. The epithelium is covered with keratin (a non-living material). § §It’s found in areas that require protection:       - Skin à Epidermis §Function:      1) Stratification à protection      2)...

Simple Epithelial Tissue

• The epithelial tissue has the following characteristics: • 1)It covers surfaces or lines cavities. 2)Rapid turn-over (time of renewal). 3)It’s formed sheets of closely packed cells. 4)The cells are polar. 5)The epithelium rests upon a sheet of extracellular matrix called the Basal Lamina. Also, most epithelia have connective tissue under them. 6)Epithelial tissues lack blood supply. Basement...