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42 Cards in this Set
- Front
- Back
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What is the prominent component of connective tissue?
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Extracellular matrix
(in addition to the cells that secrete it) |
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What is extracellular matrix made of?
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-Fibers
-Non fibers |
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What are the 4 types of connective tissue?
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1. Dense
2. Loose 3. Reticular 4. Adipose |
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What makes loose CT more loose than dense?
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It has more cells than dense.
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What are the 3 components of nonfiber ECM?
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-GAGs
-Proteoglycans -Glycoproteins |
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What is a tendon?
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Dense regular CT
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Predominant type of collagen in Dense Regular CT:
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Type I
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How are collagen fibers arranged in dense regular CT?
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Parallel to surface
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Why are collagen fibers parallel in dense regular CT?
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To give the tissue tensile strength when puled in the direction of the fibers.
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To what cells do the nuclei seen in dense regular CT belong?
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Fibroblasts
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Where in thin skin is dense irregular CT found?
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Under the epidermis, under the dermis, in the reticular area - but this isn't reticular CT mind you.
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Why is the reticular layer of the skin classified as dense irregular CT?
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Becuase it has lots of thick fibers, but they're not parallel, rather all over.
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Where is dense irregular CT commonly found?
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Encapsulating most organs.
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What is the purpose of dense irregular CT being oriented in all directions?
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To protect against mechanical stress in more than one direction.
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What do fibroblasts in dense CT do?
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Synthesize, secrete, and maintain the ECM - both fibrous and nonfibrous parts.
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What lines the lumen of the ileum?
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Villi
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What is the core of an ileal lumenal villus called?
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Lamina propria
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What is the lamina propria?
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The loose connective tissue within the villus.
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What is the overall histological appearance of loose CT?
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Nonpatterned!
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What is the function of loose CT in an intestinal villus?
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It supports the epithelium, and gives it metabolic support.
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How can loose CT give nutritional and lymphatic support to an intestinal villus?
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The loose (areolar) CT contains blood vessels.
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What is the major difference between loose and dense CT?
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Loose is very CELLULAR!
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What cells can be seen in the loose CT of the lamina propria?
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-Fibroblasts
-Macrophages -Mast cells -Smooth muscle cells -Eos/lymphs |
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What other type of intestine has lamina propria in villi?
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Cecum
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What cells can you see in the cecum lamina propria?
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Plasma cells
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What is the collective function of all the cells in loose connective tissue?
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First line defense against invasion of the body by foreign antigens.
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What are the thin lines and thick lines in the mesenteric spread slide?
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Thin = elastic
Thick = collagen |
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What type of collagen is in the mesenteric spread?
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Type I
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What is the function of elastic fibers in connective tissue?
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Flexibility and distensibility
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What are 2 organs that elastic fibers are absolutely essnetial in?
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-Blood vessels
-Lungs |
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What invisible material fills the "empty" spaces in loose connective tissue?
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-GAGs
-Proteoglycans -Glycoproteins |
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What is STROMA?
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A connective tissue framework
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What kind of CT makes up stroma?
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Reticular connective tissue
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What organs need reticular connective tissue?
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-Liver
-Lymph nodes -Spleen -Pancreas |
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What type of collagen makes up reticular fibers?
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Type 3
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How are Type III collagen reticular fibers compared to type I collagen?
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Thinner and shorter
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Do reticular fibers branch?
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Yes
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Do collagen type I fibers branch?
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No
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What are the major functions of adipose connective tissue?
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-Support
-Energy storage |
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What type of adipocytes are in the monkey eye?
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Unilocular
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Is adipose tissue highly vascularized?
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Yes
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Where are the nuclei and cytoplasmic organelles located in unilocular adipocytes?
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Distributed peripherally around the lipid droplet.
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