BIOC19H3 Lecture Notes - Lecture 6: Petri Dish, Bronchus, Lysis
Document Summary
Lecture 6: tissue interactions in development: the internal organs are formed as a result of the two interacting tissue layers: epithelium. Held together very firmly by junctional complexes and cell adhesion molecules. Top surface that faces into lumen is called apical surface and the other surface which is next to the basement membrane is called basal surface. Slide 5: the image on the left is of epithelium cells in columnar (column-like shape). Slide 6: they are scattered, irregular cells, ecm is between mesenchyme cells, make this correction on slide: secrete, not secret. Slide 7 it"s acellular not composed of cells, but have composed on fibrous molecules and proteins. Slide 8: present in basement membrane, mes is outside the iec layer coating it. In mesenchyme cell layer, they usually have a hole in the middle which called lumen. It is a hollow tube, formed by 2 cell layers, going from your. Iec = internal epithelial cells mouth to your behind.
