This fetal pig snout contains excellent examples of fibroblasts.
Fibroblasts are actively producing the extracellular matrix between the developing tissues. In this state, their cytoplasm is visible. These cells appear spindle-shaped (fusiform) with elongated nuclei.
Skin - a stratified squamous epithelium that covers the specimen. This fetal epithelium is very hydrated giving it an unusual, "fluffy" appearance.
Cartilage - the two large, oval structures near the midline with a lower cell density.
Bone - basophilic spicules often with cells on their surface.
Tooth - a protrusion of tissue that will develop into a tooth.