Human Anatomy Week 2 Notes: Tissues part 1
Human Anatomy Week 2 Notes: Tissues part 1 EEB 240
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This page Class Notes was uploaded by Stefanie Schumacher on Friday January 29, 2016. The Class Notes belongs to EEB 240 at a university taught by Dr. Alston in Spring 2016. Since its upload, it has received 31 views.
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Date Created: 01/29/16
Week 2 Anatomy notes Tissues Part One There are 4 main kinds of tissues 0 Ep heHal o Connchve 0 Muscle o Neural Epithelial Tissue o Linings or coverings Outer layer of sin Lining of stomach Glands 0 Very cellular 0 Repairs easily Connective TissueCT o Fills in gaps and holds things together 0 Stores energy 0 Provides structural support 0 Easy to repair Muscle Tissue 0 Contracts to produce movement 0 3 types Skeletal Muscle usually conscious Cardiac Muscle heart involuntary Smooth Muscle internal organs involuntary Neural Tissue o Carries information o Excitable tissue electrical impulse carriersame with muscle Epithelial Tissue 0 When classifying epithelial tissue you ask Number of layers 1 simple gt 1 strati ed Cell Shape look at cells at top layer to determine shape close to the topical surface 0 Squamous Cuboidal I Columnar I 0 Simple Squamous easily permissible Blood vessels Airsacks of lungs alveoli o Strati ed Squamous 2030 layers Skin Ends of digestive systemljl esophagus mouth and rectum Very protective 0 Simple Cuboidal Often makes tubes ln kidneys Liver Spleen o Strati ed Cuboidal generally not more than 2 or 3 layers Sweat gland duct in skin Q Q Simple Columnar elongated cells with microvilli but not always Most of digestive system Strati ed Columnar Salivary gland ducts Pseudostrati ed Ciliated Columnar Upper respiratory system Nose and trachea Transitional Stretchy unlike other epithelial tissue Bladder Large rounded cell shape looks different when stretched and relaxed in the stomach the epithelial is folded so it can expand growth of epithelial also allows stretch to happen depends on time interval uterus in pregnancy Connective Tissue part 1 Q Q Cells Can either be nonspeci c or very specialized Classify CT on Matrix what ground substance and bers are like Cell type Can arise from stem cells called mesenchyme Stem cell cell that can become anything fertilized egg Q Totipotent Pleurepotent stem cell mesenchymelittle amount in adults help make repairs Q Can t become ANYTHING but can become many things CT not nerve Types of Connective Tissue CT Properljl ground substance is a soft gel Fuid CT syrup ground substance blood and lymph Supporting CT rubbery hard gel ground substance or rigid muscles and bones CT Proper 2 groups of consistencies and bers Loose few bers easily torn skin to muscle muscle to muscle Dense tougher hard to tear many bers Loose areolar adipose reticular Q Q if a cell ends in basts it is an immature cell and secretes bers when it matures it quits secreting but it is still important and the name ends in cytes macrophages engulf other cells and destroy than White blood cells lymph nodes liver mast cells involved in in ammatory responses melanocytes contain pigments Adipose tissue Q Large cells Q Stores fat for energy padding and insulation Q Holds things in place Reticular CT Q Branched collagen bers Q A lot of stem cells for blood and lymph Q Spleen lymph nodes bone marrow Dense CT brous o More bers Q 3 varieties 2 w collagen l by arrangement of bers Dense Regular bers run in 1 direction Q Strong when pulled with the directions that the bers are running Ligaments bone to bone and tendons bone to muscle Dense lrregular bers in all different directions Q Strong in all directions Skin 0 Elastic Tissue Q Ligaments in spinal column Q Arteries so they can expand easily
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