AnaPhy(Lec), Flashcards
are secretory organs
Glands
are composed primarily of epithelium, with a supporting
network of connective tissue.
Glands
These glands develop from an infolding or outfolding of epithelium in the embryo
Glands
typically contains protein molecules in an aqueous (waterbased) fluid
Glands
typically contains protein molecules in an aqueous (waterbased) fluid
Glands
glands lose their ducts; thus they
are often called ductless glands
Endocrine
Their secretions (all hormones) diffuse directly into the blood vessels that weave through the glands.
Endocrine
Examples of endocrine glands include the thyroid, adrenals, and pituitary.
Endocrine
glands retain their ducts, and their
secretions exit through the ducts to the epithelial surface
Exocrine
include the sweat and oil glands, liver, and pancreas, are both internal and external
Exocrine
composed of many cells
multicellular gland
some exocrine glands are composed of a single cell
unicellular gland
Two major types of glands :
Multicellular and Unicellular Glands
have a single, nonbranched duct
Simple Glands
Multiple secretory regions that branch off the duct
branched
have multiple, branched ducts
compound glands
with secretory regions shaped as tubules (small tubes)
tubular glands
has those shaped in saclike structures
Acinar or Alveolar
Connects body parts
connective tissue
It is found everywhere in the body
connective tissue
It is the most abundant and widely distributed of the tissue types.
connective tissue
have a poor blood supply
tendons and ligaments
avascular
cartilages
are well
vascularized (that is, they have a good blood supply), but there are exceptions
connective tissues
Connective tissues are made up of many different
types of cells plus varying amounts of a nonliving substance found
outside the cells.
extracellular matrix
Three types of protein fibers:
collagen, reticular, elastic
help form connective tissue
protein fibers
are very strong and flexible, like microscopic ropes,
but are not very elastic
collagen fibers
are very fine collagen fibers and
therefore not a chemically distinct category of fibers
reticular fibers
very short, thin fibers that branch to form a network
reticular fibers
consist of the protein elastin
elastic fibers
this protein has the ability to return to its original shape after being
stretched or compressed, giving tissue an elastic quality
elastic fibers
composed largely of water plus some cell
adhesion proteins and large, charged polysaccharide molecules
ground substance
