Chapter 3: Tissues Flashcards
Name the four types of tissue
Epithelial, connective, muscle, and nervous
epithelial tissue…
covers body surface, lines hollow organs, body cavities, and tubes
connective tissue…
protects and supports the body, its organs, and other tissue
muscle tissue…
generates force needed for movement, associated with generating heat, breakdown and use of energy
nervous tissue…
detects change in internal and external environment, activates changes within the body
what are the defining characteristics of epithelial tissue
mostly cells bonded by specialized junctions and attached to basement membrane
what are the functions of epithelial tissue
protection, diffusion, secretion, absorption
aprical surface
free surface of cells; part of cells facing lumen, cavity or outside
lateral
side of cell that faces adjacent cells
basal
bottom of the cell, deep side
basement membrane
point of attachment and support of the cell
basement membranes also function to
slow the spread of disease
extracellular
outside cell
intercellular
in between cells
intracellular
inside the cell
nerve supply
contains nerve cells and endings can find inside epithelia tissue
blood supply
epithelial is AVASCULAR and contains no blood supply
how does epithelial tissue gets its oxygen?
diffusion
name the three types of cell junctions
tight, gap, and desmosomes
what are tight junctions?
contains the contents in the intercellular gap by creating a barrier between cells with adhesion proteins
what are gap junctions
protein channels that attach to allow cell-to-cell communication
whast are desmosomes
a junction with adhesion proteins that anchor deep into the cell so that it can undergo lots of force. Is supported by intermediate filaments.
what are hemidesmosomes
junctions that attach cell to basement membrane through the basal surface
simple epithelium
single layer of cells
common simple epithelium properties
diffusion, filtration, secretion
stratified epithelium
multiple layers of cells
common stratified epithelium properties
protection, found were there is wear and tear
pseudostratified epithelium
appears to be layered but each cell touches the bottom basal layer
squamous epithelium properties and uses
flat, thin, for diffusion and protection
cuboidal epithelium properties and uses
blocks/cubes, secretion and absorption
columnar epithelium properties and uses
tall/rectangular, protect tissue, secretion, absorption
transitional epithelium properties and uses
changes between squamous and cuboidal to accommodate stretching. Can be seen because they have bubbly tops
what are the common tissues in glands
stratified cuboidal
name the two types of clands
endocrine and exocrine
exocrine galnds
always secrete to duct which goes to body surface or hallow cavity
name some examples of exocrine glands
oil, sweat, salivary, mammary
which glands do epithelial tissue lines the secreting area of
exocrine glands
connective tissue is made up of
cells and extracellular matrix
what is the extracellular matrix made of
protein fibers and ground substance
cells in connective tissue are
- widely spaced
2. dependent on the type of tissue and where it is found
cells that end with blast typically
are immature with the ability to divide and secrete to the extracellular matrix
cells that end in cyte typically
are mature cells that carry specific function, and have limited capacity for cell division
the ground substance of the extracellular matrix
can be either fluid, gelatinous, or calcified. They all support cell, bind to other cells, and can change properties of the cell
the three types of fibers in the extracellular matrix
collagen, elastic, and reticular
what is the function of the fibers in the extracellular matrix?
strenthen and support connective tissue
Collagen fibers are
strong, resist pulling but are still flexible. They are made of the protein collagen
Elastic fibers are
strong, branches, thin, flexible, and can returen to their original shape after stretching. They are made of the protein elastin
Reticular fibers are
branches, interwoven to provide support, and are made of the protein collagen
Name the five types of connective tissue
loose, dense, cartilage,osseous, and liquid
most loose connective tissue
has many cells and their fibers are loosely intertwined
name the three types of loose connective tissue
areolar, adipose, and reticular
areolar loose connective tissue
is the deep basement membrane of the epithelial tissue
adipose loose connective tissue is
deep to skin, store energy, filled with lipids, with few fibers
reticular loose connective tissue is
has many cells and supports organ framework with reticular fibers
most dense connective tissue
has less cells than loose ct, more fibers that can be regularly or irregularly arranged
the three types of dense connective tissue are
regular, irregular, or elastic
regular dense connective tissue
strongest tissue to planar direction of fibers, tendons, ligaments
irregular dense connective tissue
capsules of organs and dermis of cell, found in the dermis
elastic dense connective tissue
found in walls of blood vessels
cartilage consist of these types of fibers for strength
elastic and collagen
what is the ground substance of cartilage
chondroitin sulfate for resiliance
cells in the cartilage are
condrocytes and condroblast
the blood supply in carilage
there is none, which is not good for repair
the nerve supply in cartilage
there is none, so no pain or feeling in those areas
Name the three types of cartilage
hyaline, fibrocartilage, elastic
what is the function of hyaline carilage
reduce friction and provide stiff support
where can you find hyaline cartilage
joints, ends of bones, end of nose, respiratory system, voicebox.
define fibrocartilage
strongest type, dense, many collagen fivers
give some examples of fibrocartilage
intravertretal discs, menisci (knee)
define elastic cartilage
highly flexible and resilient cartilage that has the ability to return to its original state
give an example of elastic cartilage
the external ear
osseous connective tissue is
bone
what type of cells make up osseous connective tissue
osteocytes
what are the two types of osseous connective tissue
compact and spongy
what are compact osseous connective tissue
extracellular matrix arranged in concentric rings