connective tissue proper Flashcards
function of lose connective tissue
anchoring and packing material of body, embedding material for many structures like blood vessels and many organs too, structural framework to most organs , binds other tissues and organs together
example of lose connective tissue
subcutaneous, omentum and mesentery
components of lose connective tissue
fiber, ground substance, cells
commonest cells in lose connective tissue
fibroblast and macrophages
why lose connective tiss is called as loose areolar connective tiss?
the ground substance is dissolved by xylol and alcohol so when stained the ground substance is shown as empty oval areas called areolar
how dense irregular connective tissue is seen? or from what is made up of?
it is in the form of shees, make mainly from collagen fibers interwoven to make a meshwork and also has elastic fibers
where is dense irregular connec tiss found?
deep fascia and capsule of organs such as kidney, liver, thyroid and prostate gland, tested etc, perichondrium of cartilage and periosteum of bone
what are the 2 types of dense regular connective tissues?
dense regular collagenous tissues
dense regular elastic tissues
dense regular collagenous connective tissue is made up of and describe structure?
closely packed collagenous fibers run parallel and contains fibroblast and some ground substance
what does tendon look like and what is its job
tendons are cord like and join bone to muscle
what does ligaments look like and what is its job?
ligaments are band like and join bone to bone
what colour does tendon and ligament and why on naked eye?
they are white in colour cause they are only composed of collagen fibers
how are fibroblast seen in longitudnal sec
elongated and aligned in rows b/w the bundles
how are fibroblast seen in cross sectional?
star shaped with extensions
the covering of lose connective tissue on the fascicle is called?
endotendineum
the covering of the tendon is called?
ectotendineum
what are aponeuroses
flat, broad flattened tendons that connect sheet like muscles to bones
what are dense regular elastic loose connective tissue composed of?
bundles of thick elastic fibers also contains collagenous fibers and fibroblast
where regular elastic loose connective tissue present in?
vocal cords, ligamenta flava of vertebral column, suspensory ligament of penis
what does reticular connective tissue made up of?
reticular fiber and reticular cells
the reticular fiber is derived from what collagenous type?
type III
explain the appearance of reticular cells
stellate shaped, have long process that extend around the reticular fibers and also connect and communicate with other cells.
this speacial arrangement of reticular cells make up with structure?
trabeculae structure
trabecular structure act as a framework for what organs
lymphoid organs hemopoietic (bone marrow, lymph nodes)
the spaces b/w the trabeculae contains?
lymphocytes and precursors of blood cell
white adipose tissue is found in subcutaneous layers called as/
panniculus adiposus
where is white adipose tissue found?
subcutaneous layers of axillae, buttocks and thigs
fat is stored in both sexes in?
omentum, mesentery and retroperitoneal space around kidneys
white adipose tissue stores fat as?
triglycerides
brown adipose tissues seem brown to naked eye because?
they are highly vascular and contains mitochondria
at what age brown adipose tissue is abundant in human body?
in new borns
in adults where brown adipose tissue is found?
mediastinum, posterior triangle of the neck, abdominal aorta and kidneys
how heat is produced by brown adipose fat?
non shivering thermogenesis
