Unit 6 Tissue Structure & Function Flashcards
What is the general structure of Epithelial Tissue
- Highly cellular - little or no extracellular materials.
- Cells exhibit polarity
- Basal cells attach to a basal lamina - mixture of glycoproteins and collagen that itself attaches to reticular lamina; together forming the basement membrane.
- Nearly completely avascular.
- replacing damaged or dead cells.
Epithelial Tissue General Function
- The body’s first line of defense from physical, chemical, and biological wear and tear.
- Control permeability of substances into the body.
- Many capable of secretion of mucous and other chemicals onto the apical surface.
Location and Function of Simple squamous cells
Simple squamous cells
Location: Air Sacs of lungs, lining of the heart and lymphatic vessels
Function: allows materials to pass through by diffusion and filtration and lubricating substance
Location and Function of simple cuboidal cells
simple cuboidal cells
Location: In ducts and secretory portions of small glands and in kidney tubules
Function: Secretes and absorbs
Location and function of Simple columnar cells
Simple Columnar Cells
Location: cilliated tissue are in bronchi, uterine tubes and uterus, digestive tract and bladder
Function: absorbs; secretes mucous and enzymes
Location/Function of Psuedostratified columnar cells
Psuedostratified columnar cells
Location: cilliated tissue lines the trachea and most of upper respiratory tract
Function: secretes mucous; ciliated tissue moves muscles
Location/Function Stratified Squamous cells
Stratified Squamous cells
Location: lines the esophagus, mouth and vagina
Function: protects against abrasion
Location/Function Stratified cuboidal cells
Stratified cuboidal cells
Location: sweat glands, salivary glands, mammary glands
Function: protective tissue
Location/Function Stratified columnar cells
Stratified columnar cells
Location: make urethra, ducts of some glands
Function: secretes and protects
Location/Function of Transitional Epithelium
Transitional Epithelium
Location: Lines the bladder, urethra and the ureters
Function: allows the urinary organs to expand and stretch
General structure of CONNECTIVE TISSUE
disperse in a matrix, which usually includes a large amount of extracellular material produced by the connective tissue
Major component of the matrix is a ground substance crisscrossed by protein fibers
General function of Connective Tissue
Most important function is to support and connect other tissues
Secondary functions:
- Protection of delicate organs
- defence against micro-organisms
- transport of fluid, nutrients, waste and hormones
- energy storage and insulation by fat
Types of loose connective tissue?
Loose Connective tissue
- areolar
- adipose
- reticular
Dense Connective Tissue
- regular elastic
- irregular elastic
What is supportive connective tissue?
Provides structure and strength to the body and protect soft tissues with few cell types and densely packed fibers.
Types of Supportive Connective Tissue?
H.F.E
Bones?
Cartilage
- Hyaline
- fibrocartilage
- elastic
Bones
- compact bone
- cancellous bone
What is fluid connective tissue?
has various specialized cells circulating in a watery fluid.
Types of Fluid connective tissue?
Blood and Lymph
Name 3 types of Connective Tissue Proper?
F.A.M
- fibroblasts
- adipocytes
- mesenchymal cells
What 3 types of protein fibers do fibroblasts secrete?
C.E.R
- collagen
- elastic
- reticular
What do Adipocytes do?
- stores lipids as droplets that fill most of the cytoplasm
What are Mesenchymal cells?
- multipoint adult stem cells that can differentiate into any type of connective tissue cell
What is loose connective tissue for?
- acts to absorb shock and bind tissues together
What are 3 types of loose connective tissue?
- Adipose Tissue
- areolar tissue
- reticular tissue
Describe adipose tissue
- consists mostly of fat storage cells, with very little extracellular matrix
