The Study of the microscopic structures of tissues Histology The Study of the microscopic structures of tissues
Histological Grouping of Tissue 1. Epithelial Tissue 2. Connective Tissue 3. Muscle 4. Nervous Tissue
Epithelial Tissue Tissue that covers a body surface or lines a body cavity. Is named based on two criteria: 1. Cell shape 2. Cell layers Functions in: protection, absorption, filtration, excretion/secretion and as a sensory receptor
Cell Layers 1. Simple: one cell layer 2. Stratified: two or more cell layers 3. Pseudostratified: one cell layer but looks as if it has several layer .
Cell Shape 2. Columnar: column shaped cells 1. Cuboidal : cubed shaped cells 2. Columnar: column shaped cells 3. Stratified: flat scale shaped cells
Epithelial Slides Covered On ALL SLIDES BE ABLE TO IDENTIFY THE TYPE OF TISSUE AND KNOW: CELL MEMBRANE, CYTOPLASM NUCLEUS Slides covered 1. Simple squamous epithelium 2. Simple cuboidal epithelium 3. Simple columnar epithelium 4. Pseudostratified ciliated columnar epithelium Know: cilia, goblet cells 5. Stratified squamous epithelium
Simple Squamous Epithelium
Simple cuboidal epithelium
Simple columnar epithelium
Pseudostratified ciliated columnar epithelium
Stratified squamous epithelium
Connective Tissue The most abundant and widely distributed tissue Functions in: binding and support, protection, insulation and transportation Characterized by having few cells scattered about a nonliving matrix.
Adipose Tissue Know Nucleus lipids
Aereolar Connective Tissue Know: Fiberblast Collagenous fibers Elastic fibers
Blood
Bone
Hyaline Cartilage Know: Lacunae Rubbery matrix chondrocytes
Elastic Cartilage Know Lacunae Elastic fibery matrix chondrocyte
Reticular Connective Tissue Know: Reticular cells Reticular fibers
Divided into 3 categories: Smooth Cardiac Muscles Divided into 3 categories: Smooth Cardiac
Skeletal muscle cross section
Skeletal muscle longinal section
Smooth Muscle
Cardiac Muscle
The functional unit of nervous tissue is the neuron More later
Neuron