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Ch 5 Tissues
Ch5 Tissues for Bethel University
64
Biology
Graduate
01/12/2010

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Term
Tissue
Definition
group of similar cells that perform a common function
Term
Matrix
Definition
nonliving intercellular materix
Term
Embryonic Tissues
Definition
endoderm, ectoderm and mesoderm
Term
histogenesis
Definition
process of the primary germ layers differentiating into different kind of tissues
Term
Extracellular Matrix (ECM)
Definition
if a complex nonliving material between cells in a tissue
Term
Components of the ECM
Definition
Water and Proteins
Term
ECM proteins
Definition
structural and glycoproteins
Term
ECM structural proteins
Definition
collagen (white fibers) and elastin
Term
ECM glycoproteins
Definition
fibronectin and laminin
also allow communication to occur within tissues
Term
Proteoglycans
Definition
hybrid molecule of a protein backbone with a carbohydrate attached
-different proteoglycans give different characteristics to ECM ,such as thickness and shock absorption
Term
ECM functions
Definition
helps bind tissues together structurally
-allows local communication through connection with integrins in plasma membranes
Term
Types of Epithelium
Definition
Membranous and Glandular
Term
Function of the Epithelial Tissue
Definition
protection, sensory function, secretion, absorption and excretion
Term
Generalizations about epithelial tissue
Definition
limited amount of matrix material
avascular
membranous type is attached to a basement membrane
cells are in close proximity, with many desmosomes and right junctions
capable of reproduction
Term
Simple squamous epithilium
Definition
one cell layer think, flat cells
permeable to many substances
ex endothelium of blood vessels, pleura
Term
Simple cuboidal Epithelium
Definition
found in many glands and ducts
Term
simple columnar epithilium
Definition
cells often modified for certain functions such as goblet cells, cilia, microvilli
often lines hollow visceral structures
Term
pseudostratified columnar epithilium
Definition
found lining air passages and segments of male reproductive system
motile cilia and mucus are important modification
Term
Stratified epithelium
-Keratinized stratified squamous epithelium
Definition
covering outer skin on body surfaces
most likely dead
serves for protection
Term
nonkeratinized stratified squamous epithelium
Definition
lining of vagina, mouth and esophagus
free surface is moist
primary function is protection
Term
stratified cuboidal epithelium
Definition
basement membrane is indistinct
located in sweat gland ducts and pharynx
Term
stratified columnar epithelium
Definition
rare
found in lining of male urethra and near anus
Term
transitional epithelium
Definition
-located in the lining of hollow viscera subjected to stress
-protects organ walls from tearing
Term
Glandular Epithelium
Definition
exocrine and endocrine
Term
Simple exocrine glands
Definition
one duct leading to the surface
Term
compound exocrine gland
Definition
have two or more ducts
Term
Functional Classification of Exocrine Glands
Definition
Apocrine, Holocrine and Merocrine
Term
apocrine glands
Definition
secretory products collect near apex of cell and are secreted by pinching off the distended end
secretion process results in some damage to the cell wall and some loss of cytoplasm
mammary glads are a good example
Term
Holocrine Glands
Definition
-cells rupture,releasing chemicals into the duct.
-sebaceous glands
Term
Merocrine Glands
Definition
Secrete directly through cell membrane with no damage to the cell
most numerous gland type.
ex. salivary glands
Term
Connective Tissue
Definition
concists of fluid, gel or solid matrix with or without extracellular fibers and proteoglycans or other compounds that thicken and hold together the tissue.
Term
General Function of the connective tissue
Definition
connects, protects, transports and supports
Term
Four Main types of Connective Tissue
Definition
Fibrous, Bone, Cartilage and Blood
Term
Fibrous connective tissue: Four types
Definition
Loose (areolar), Adipose, Reticular and Dense (irregular or regular)
Term
Bone Connective Tissue
Definition
Compact bone and Cancellous bone
Term
Cartilage Connective Tissue
Definition
Hyaline, Elastic and Fibrocartilage
Term
Loose Connective Tissue (areolar)
Definition
Most common,
Intracellular substance is prominant
Consists of collagenous and elastic fibers
Several kind of cells present (fibroblast, microphages, mast cells, fat cells, plasma cells and white blood cells)
sterchy flexible connection
Term
Reticular Tissue
Definition
forms framework of spleen, lymph nodes and bone marrow
consists of network of branching reticular fibers with reticular cells overlying them
Term
Function of Reticular Tissue
Definition
defense against microorganisms and other injurious substances, reticular meshwork filters out injurious particles and reticular cells phagocytose them
Term
Dense Fibrous Tissue
Definition
densely packed fibers and relatively few fibroblasts
found in tendons and ligaments
irregular and regular
Term
Irregular dense connective tissue
Definition
found in sections of dermis
Term
dense regular connective tissue
Definition
found in tendons and ligaments
Term
Bone Tissue
Definition
Hard and strong tissue type
Composed of calcium and other minerals
Term
Bone Tissue Function
Definition
support, protection, point of attachment for muscle, reservoir for minerals, support blood forming tissue
Term
Compact Bone
Definition
composed of osteons
Term
Osteon (Haversian system)
Definition
structural unit of bone
Term
Lacunae
Definition
spaces for osteocytes
Term
Lamellae
Definition
matrix present in concentric rings
Term
Canaliculi
Definition
Canals that join lacunae with the central Haversian canal
Term
Cancellous Bone
Definition
Supports red bone marrow, composed of Trabeculae, called spongy bone
Term
Trabeculae
Definition
thin beams of bone
Term
Cartilage
Definition
avascular
chondrocyte is the only cell type
perichondrium is the membrane that surrounds cartilage
Term
Hyaline Cartilage
Definition
Most prevalent type of cartilage
located on ends of articulating bones
Term
Fibrocartilage
Definition
strongest and most durable type of cartilage
matrix is semirigid and contains white fibers
found in intervertebral disks and pubic symphysis and knee
Term
Elastic Cartilage
Definition
provides strength and flexibility
contains many fine elastic fibers
located in the external ear and larynx, tip of nose
Term
Cutaneous Membrane
Definition
primary organ of integumentary system
one of the most important organs
Term
Parietal
Definition
adjacent to organ wall, line closed body cavities
Term
Visceral
Definition
actually encloses the organ, cover visceral organs
Term
Pleura
Definition
surrounds a lung and lines the thoracic cavity
Term
Peritoneum
Definition
covers the abdominal viscera and lines the abdominal cavity
Term
Mucous Membranes
Definition
lines and protects organs that open outside the body
lines respiratory, digestive and other tracts
Term
Lamina Propria
Definition
fibrous connective tissue underlying mucous epithelium
Term
Synovial Membranes
Definition
line the spaces between bone in joints
also line bursae
Term
Connective Membranes
Definition
do not contain epithelial components,
found lining spaces between bones
secrete synovial fluid
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