Connective Tissue 2 Flashcards
3 types of connective tissue
connective tissue proper (loose and dense
specialized (cartilage and bone)
embryonic (mesenchyme and mucous)
2 main types of embryonic connective tissue
1) mesenchyme.
2) mucous CT
mesenchyme embryonic CT is derived from ____. Composition?
derived from MESODERM. Mainly cells, no fibers. irregularly shaped cells that may be connected by CYTOPLASMIC PROCESSES
mucous embryonic CT is found in the __ ___. composition?
found in the umbilicle cord. Few cells, lots of ground substance and collagen fibers.
areolar tissue includes what types of cells? what kind of fibers are present in this tissue? where can you find this CT?
Loose Aereolar CT has many types of cells (mast cells, macrophages etc.) but most prevolent is fibroblasts.
- has both collagen and elastin fibers
found in :upper dermis, mesenteries, around blood vessels and muscles.
purpose of reticular connective tissue? where would you find this?
reticular connective tissue is reich in reticular fibers made of reticulin.
forms the framework or many HEMOPOEITC organs (liver, spleen, lymph nodes)
Yellow/white adipose CT is __locular, which means:
unilocular: one huge fat droplet that pushes all organelles and nuceli to edge of cell membrane.
function of white adipose CT
METABOLISM REGULATION, energy reserve (adipocytes store triglycerides), insulation, and protection
location of white adipose CT
subcutaneous layer of skin, may act as visceral fat, around some organs (structural fat).
ALSO IN MEDULLARY CAVITY OF LONG BONES and in MAMMARY GLANDS.
how does white adipose CT facilitate metabolism regulation?
it produces LEPTIN that influences aptude. (decreases appetite) therefore, because white adipose CT produces hormones, it is an ENDOCRINE ORGAN.
brown adipose CT is ___locular. Why is it called brown adipose? Function?
MULTILOCULAR; multiple fat droplets. Organelles and nuclei may or may not be pushed around the edges or trapped between fat droplets in the middle of the cell.
brown in color because a lot of mitochondria and highly vascular
function: thermoregulation
3 types of dense CT
1) dense regular
2) dense irregular
3) dense regular ELASTIC
Composition of dense REGULAR CT? What structures does dense regular CT form?
Composed of parallel bundles of collagen 1 fibers. Very strong. Makes tedons and ligaments.
Composition of dense IRREGULAR CT? What structure does it form?
randomly oriented bundles of collagen type 1. Forms the deep dermis of skin, organ capsules, fasciae, periosteum and perichondrium.
composition of dense regular elastic CT? wwhere is this found?
made of parallel elastic fibers. found in VOCAL CORDS
specialized CT function
for SUPPORT. not necessaily binding and connecting organs.
2 types of specialized CT
1) cartilage (flexible support)
2) bone
T/F cartilage is avascular
true.. it gets its nutrients from perichondrium.
main fiber in cartlage
collagen. can’t usually see it. Elastic cartilage also has elastic fibers
hyaline cartilage contains ___ ___ which allows it to be highly hydrated
hyaluronic acid, allows for cross linking of type 2 collagen and proteoglycan. highly hydrated = strong
3 types of cartilage
1) hyaline
2) elastic
3) fibro
what type of fiber is associated with hyaline cartilage? where can you find hyaline cartialge?
collagen 2
found in fetal skeleton, trachea rings, larynx, nasal septum, articular surfaces ofbones but with no perichondrium
function of elastic cartilage. Location?
function: provide support but a bit more flexible.
location: epiglottis, eustacian tube, ear.
location of fibrocartilage. characterized by alternating layers of ____ ___ and ___ ____ CT.
Pubic symphisys, intervertebral discs, where ligaments insert into bone. characterized by alternating layers of HYALINE CARTILAGE and DENSE REGULAR CT.
T/F: Fibrocartilage has a perichondrium
false.
