KAAP309 Lecture Notes - Lecture 5: Vascular Plant, Multinucleate, Ectoderm
28 Feb 2017
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Different stains for different tissue (h&e default) Different aspects of different tissues: electron microscopy. Add heavy metal to deflect electron beam: artifacts of fixation, sectioning, staining. Polarity (one side faced inward, the other faces outward) Supported by connective tissue (basal lamina/basement membrane) Endocrine glands: secrete chemicals into the blood, ductless, small organs. Exocrine glands: secrete substances to the outside world, unicellular. Sebaceous glands, gi tract, mammary, salivary: types of multicellular exocrine glands. Named after # of layers and cell shape. Large amount of extracellular matrix: structural elements. Cytes: mature cells: loose connective tissue. Description: gel-like matrix, contains fibroblasts, macrophages and mast cells. Function: wraps/cushions organs, macrophages phagocytizes bacteria, holds and conveys tissue fluid. Description: matrix (sparse, closely packed adipocytes. Function: provides reserve energy, insulation, support and protects organs. Description: reticular fibers in a loose ground substance, cells lie on the network. Location: lymphoid organs (bone marrow and spleen, dense. Description: parallel collagen fibers, few elastin fibers, fibroblast.
