T/S through spinal cord in situ.

T/S through base of heart ( note aorta to the right of the image).

Developing trachea.

Lung is upper right.

Developing rib: cartilage-stage.

Developing thymus?

Developing skin: positivity is mostly confined to developing hair follicle epithelium.

Developing oesophagus and stomach show nuclear positivity.

Also, to the left, are positive chondroblasts/cytes ( developing ribs)

Lateral ventricle ( adult) showing svz and striatum.

Cortex. I think that the positive nuclei are microglia or astrocytes ( note several positive nuclei in the pia) as there is a moderate cytoplasmic process positivity ( ?specific? ).