How do you spell epi-the-lium?
Epithelium take two!
Dem' Bones
Dog at a Bone
Can you pass me a tissue?
Random AF
What's the issue with this tissue?
100
lining: closely apposed cells, acts as a cover
glandular: invagination or aggregation of cells that forms a solid tissue structure
types of epithelium and their function
100
surface attached to basement membrane
basilar
100
bone is composed of
primary extracellular matrix and cells
100
osteocytes are connected by
canaliculi
100
This tissue provides structural and mechanical support for other tissues as well as meditates the exchange of waste and nutrients between circulation and other tissues
connective tissue
100
surface farthest from basement membrane
apical
100
True or false, Collagen fibers are inelastic
true
200
epithelium cells are classified in 4 different shapes known as:
squamous, cuboidal, columnar and urothelium
200
the type of epithelium that lines the bladder
urothelium
200
bones can can only grow in layers and not from within which is known as
appositionally
200
the layer on the inside surface of trabecular bone
endosteum
200
synthesize collagen and ground substance of the extracellular matrix
fibroblasts
200
The words tight, gap, desmosomes and hemidesmosomes are used to describe
the 4 types of cellular connections epithelium make.
200
represent an adaptive immune response in tissue
Leukocytes
300
the type of glands release chemical substances directly into the bloodstream or tissues of the body
endocrine glands
300
These glands release chemical substances through ducts to outside the body or onto another surface within the body
exocrine
300
osteoblasts come from
mesenchymal stem cells in periosteum
300
the histological appearance of this bone is dense regular/parallel collagen arrangement; few osteocytes; osteoblasts lining surface
lamellar bone
300
attaches bones to bones and muscles to bones and also found in the dermis of the skin - appears to be closely packed collagen fibers with interspersed fibroblasts and fibrocytes
dense fibrous connective tissue
300
these two components make up all connective tissue
cells and extracellular matrix
300
phagocytose foreign material in the tissue layer
Marcophages
400
simple squamous epithelium known as serosa or mesothelium cover
internal organs
400
this simple squamous epithelium lines blood vessels
endothelium
400
these are bone destroying cells that are responsible for reabsorbing inorganic material from bones and bone maintenance
Osteoclasts
400
These are the two coverings of bones
periosteum and endosteum
400
release large amounts of histamine and enzymes in response to antigen recognition
Mast Cells
400
this determines the permeability of collagen
amount of ground substance
400
The microscopic appearance of connective tissue can be divided into two forms:
fibrous or embryonic
500
Epithelial cells that do not produce and secrete extracellular products - acts as a covering - seen in skin, urinary bladder, esophagus
non-glandular function
500
Flattened, wider than they are tall - two types (endothelium and mesothelium) - can be found in blood vessels or on the outside of the organs
simple squamous epithelium
500
process in which the bone changes shape - seen during time of disease and development - two step process (resorption and production)
modeling
500
process in which "old" bone is replaced by new bone - bone does not change shape - allows bone turnover at osseous envelopes while still maintaining its shape - happens in the same four step sequence
remodeling
500
Type III collagen is found in
reticular fibers, healing wounds, smooth muscle and fetal skin
500
cells in the uppermost layer of stratified squamous epithelium lose their nuclei and organelles and leave behind the keratin; forms a waterproof barrier
the process of cornification
500
Tissue that binds epithelia to underlying tissues and holds organs in place - representing a network of type I collagen and reticulin fibers with interspersed ground substance, cells, and blood vessels
loose connective tissue
600
the four ways to classify epithelium
number of layers of the cells, shape of the cells at the free surface, function of the epithelium (glandular vs non-glandular), surface modifications
600
this represents what type of epithelium
psuedostratified columnar
600
The two mechanisms by which bones grow
Membranous ossification and endochondral ossification
600
These are known as:
Zones of Physis
600
________ form supporting frameworks for the liver, lymphoid organs, capillary endothelia and muscle fibers.
reticular fibers
600
the gelatinous substance responsible for determining the permeability of connective to solutes an proteins
Ground Substance
600
connective tissue is comprised of these four cells
Fibroblasts, macrophages, leukocytes, adipose cells