Location of the thymus

Gross structure of thymus

2 Main Areas of Thymus

Location of Positive Selection

Positive Selection

Effect of cortex on T-cells

T-cell specialisation

Purpose of Negative Slection

Negative Selection

Thymus defects

Location of Spleen

White pulp of spleen

Red pulp of Spleen

Detection of aged erythrocytes

Debris and pathogens in spleen

Only Lymphatic Tissue

Lymphatic Tissue

Lymphatic Nodules- Mouth

Lymphatic Nodules- Intestines

Lymphatic Nodules- Respiratory Tract

Cells contained by lymphatic nodules