Figure 4.5 Date is 10-16-19
- Columnar Epithelial
- – Pseudo stratified ciliated columnar epithelium ,
- Location – Lining of nasal cavity, trachea, and bronchi, portions of the male reproductive tract.
- Function : protection and secretion.
- Stratified Columnar Epithelium (multiple layered column cells.
- Locations – Small areas of the pharynx, epiglottis, anus, mammary gland, salivary glad ducts , and urethra
- Function: Protection
- Exocrine glands – made mostly of simple cuboidal epithelium
Connective Tissue functions
- Establishes a structural framwork – bones
- Transports fluids and dissolved materials – blood, cardiovascular system
- Protects delicate organs – adipose tissue
- Supports, surrounding and interconnecting tissues – areolar conncective tissue
- Storing energy reserves – adipose
- Defends the body from microorganims – white blood cells
Contain specialized cells,
matrix (not living), composed of extracellular protein fibers and a ground substance.
- blasts – creates
- clasts – destroys, breaks down
- cyte – maintains
- Types of fibers
- Collagenous – collagen – very strong protein.
- Elastic – elastin
- Reticular – collagen, threadlike protein. Adds more strength.
Connective tissue proper classified as loose or dense.
- Cells – Fibroblasts, Macrophage,
- Fibers – Elastic, Collagen, Reticular
- Ground Substance – Proteoglycan , “filler” substance, low viscousity
- Loose Connective Tissue
- Located in the Dermis
Adipose tissue – vascular
- Cells – Adipocytes
- No fibers
- Ground Substance – Proteoglycan
- Loose Connective tissue
- Location – hypodermis
- Fibers- reticular fibers
- Ground substance – proteoglycan
- Loose connective tissue
- Location – soft organs, liver and spleen.
Dense Regular Connective Tissue – holds bone to bone together, dense and powerful.
Dense Irregular Connective Tissue
- Cells- Fibroblasts
- Fibers- Collagen fibers
- Location- Dermis
- Cells- fibroblasts
- Fibers- Elastic
- Ground substance- proteoglycan
- Dense connective tissue
- Location – inter vertebral
Fluid Connective Tissues
Blood– blood cells, white blood cells, and platelets. Floats in the plasma and is located in the blood vessels.
Cartilage – bone support for the rest of the body.
- Between tips of (joints) bones for friction.
- Cells- Chondrocytes in lacunae
- Fibers- collagen
- Ground Substance – firm gel chondroitin sulfate
- Location – in joints
The Perichodrium and Types of Cartilage
- Location – Auricle of external ear, epiglottis, auditory canal, cuneiform cartilages of larynx.
- Function – Provides support, but tolerates distortion without damage and returns to original shape
- Fibers – collagen cartilage
- Location – pads within knee joint, between pubic bones of the pelvis, and inter vertebral discs.
- Function – Resists compression, prevents bone-to-bone contact, limits relative movement
- Cells – osteocytes
- Fibers – collagen fibers
- Ground Substance – Hydroxlyapatite, hard as a rock.
- Location – in bones obviously
- Function – support