Anatomy 3601: Lecture 2
Anatomy 3601: Lecture 2 FSCN 1112
U of M
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This 3 page Class Notes was uploaded by alliemartinnn Notetaker on Thursday January 28, 2016. The Class Notes belongs to FSCN 1112 at University of Minnesota taught by Mashek, Douglas in Summer 2015. Since its upload, it has received 10 views. For similar materials see Principles of Nutrition in Nutrition and Food Sciences at University of Minnesota.
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Date Created: 01/28/16
Epithelial and Connective Tissues Types of Tissues 1. Epithelial Tissue ○ True Epithelium, Mesothelium, Endothelium 2. Connective Tissue ○ Proper and Specialized 3. Muscle Tissue ○ Smooth, Skeletal, Cardiac 4. Nervous Tissues ○ Neurons, Schwann Cells, Satellite Cells Essential parts of all tissues: ➢ Cells ➢ Matrix (extracellular fibers + ground substance) Epithelial Tissue ● Structure ○ Dense, polarized cells ○ Line free body surfaces ■ Skin epidermis (true epithelia) ■ Body cavities (mesothelia) ■ Body tubing (endothelia) ■ Lumen= free surface surrounded by an epithelium ○ Cells are joined by junctions ○ Supported by basement membrane ■ Collagen + ground substance ■ Basement membrane = basal lamina + reticular lamina ■ Apical Surface= surface exposed to lumen ○ Epithelia are avascular ■ Nutrients and oxygen come from lumen ○ High rates of cell death and regeneration ○ Contain glands (Glandular Epithelia) ● Function ○ Protection ○ Flexibility ○ Secretions ○ Absorption ○ Endocytosis ● Classification ○ Based on: ■ number of cell layers ■ cell shape ■ specializations ○ Simple= one layer of cells ○ Stratified= multiple layers of cells ○ Squamous= flat surface cells ○ Cuboidal= cube shaped cells ○ Columnar= column shaped cells True Epithelia Mesolthelia Endothelia ● Mucous ● Serous ● Lines blood membrane membrane vessels and heart ● Exposed to ● Lines body outside cavities ● Cutaneous or mucosa Connective Tissue ● 5 Main types 1. Connective Tissue Proper ■ Loose Areolar ■ Adipose ■ Dense Regular ■ Dense Irregular 2. Cartilage 3. Bone 4. Blood 5. Lymphoid (Reticular) ● Functions ○ Bind tissues and organs ○ Nourish other tissues ○ Skeletal support ○ Fight infections ○ Store nutrients ○ Insulation ● Characteristics ○ Cells of connective tissue ■ Fibroblasts, macrophages, adipose, mast cells, lymphos, Blymph ○ Extracellular Matrix ■ collagen, elastic, reticular fibers ○ Ground Substance ■ liquid/gel substance containing water, proteins, nutrients, wastes ● Connective Tissue Proper ○ ]Major Types ■ Loose → more ground substance, less fibers ● Areolar ○ Most abundant, underlies most epithelia, retains body fluids, defends against infections ○ Cells inside: fibroblasts, macrophages, mast cells, blood cells, Collagen Type 1, Reticular Fibers ● Adipose ● Reticular ■ Dense → less ground substance, more fibers ● Dense Regular (parallel) ● Dense Irregular (not parallel)
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