Physiology 3140A Lecture Notes - Lecture 2: Hypoblast, Epiblast, Respiratory System
27 Nov 2015
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Document Summary
Cells divide repeatedly to produce different cell types. Cell types are determined by the genome through selective gene expression: controls how much the cell will proliferate, when it will specialize, how it will specialize, what it will interact with and if/how it will move. Cells maintain their specialized characters because they have a record of signals received during embryonic development. All the different cell types that we have work together to form tissues: tissues work together to form organs (cid:2) (cid:2) what are the five classes of tissue types, nervous tissue: Mental activity, sensory input and integration, regulates muscles and glands, homeostasis. Muscle, cardiac muscle, smooth muscle: connective tissue: Supportive role in tissues and organs: energy storage (e. g. nutritional support for epithelium), protection of organs, tissue repair, structure. Collagen based (bones, teeth, cartilage, tendons), fat: epithelial tissue: Lines surfaces and cavities; secretion, absorption, protection, etc. Blood vessel cells, alveoli, gut lining, epidermis: blood:
