BIOC19H3 Lecture Notes - Lecture 6: Petri Dish, Mesi Protocol, Cell Nucleus
5 Nov 2017
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Document Summary
Tissue interactions in development: differentiation and growth of tissues and organs during development, after gastrulation (and formation of the three germ layers, ecto-, meso- and endoderm), internal organs begin to be formed. In this lecture we will see how tissue interactions are crucial for the formation of internal organs such as the digestive tract, the pancreas and the lungs. In the embryo, internal organs are forming such as the liver, pancreas, lungs and the gastrointestinal (gi) tract, (esophagus, stomach, intestine) Two important interacting tissues during organogenesis of internal organs- iec & mes: basement membrane: a specialized, sheet-like structure that separates epithelial cells from the surrounding connective tissue. Consists of extracellular matrix proteins held together by collagen. Mes mesenchyme individual cells scattered with blood vessels. ^ 2 layers that interact for formation of internal organs. Inducing tissue gives off inducing factors that affect iec layers and cause differentiating layers to differentiate into diff cell types.
