connective tissue Flashcards
what is the most abundant tissue in the body that is found in many forms and various consistencies
connective tissue
what are the functions of connective tissue(4)
support and strengthens other tissues
protects and insulates internal organs
separates structures (eg. m. in groups of m.)
main source of immune response
what is the area of energy reserve storage for connective tissue
adipose tissue
t/f connective tissue is highly vascular without any exceptions
false except for cartilage which is avascular
what is blood used for in connective tissues
transport sys
is connective tissue similar to epi tissue concerning its organization
no it contains large amounts of extracellular material in which are found single cells or groups of cells
what consists extracellular matrix
protein fibers and ground substance
what determines a tissue’s quality
the structure of the extracellular matrix
amount of ground substance found btw the cells and fibers in connective tissue can be
fluid (loose), semifluid(loose), gelatinous(loose)
and calcified (dense)
what is the function of ground substance (4)
support cells, binds them together, stores water, provides a medium of exchange btw blood and cells
what are the 2 most common cells associated w connective tissue
fibroblasts and macrophages (phagocytes)
what are fibroblasts (look, form what, and found where)
-large, flat cells w branching processes
-form the fiber for strength and structure (mature cells=fibrocytes)
-found in all general connective tissue, most numerous
what are macrophages (function)
move thru matrix and engulf waste products or dead cells, can be fixed or wandering
what does blast mean
younger, builder and immature cell
do the macrophages and fibroblast have to work in sync
yes
what are the 3 types of fiber (fibrillar extracellular matrix found in the ground substance btw the cells) in connective tissue
collagenous (white)
elastic (yellow)
reticular (neutral)
what is collagenous fiber in connective tissue (whats it made from, form found has, strong?, function)
made from protein collagen
usually found in // bundles
strong like steel cable (resists to tensile forces like stretching or pulling), non-elastic but not stiff
supportive function
what is the most abundant protein in the body
collagen
what is elastic fiber in connective tissue (form found in, made from what, strong?, can be stretched?)
long cylindrical ribbon structure
made from protein elastin
strong but has an elastic quality (rubberband)
can be stretched 150% but returns to og length
what is elastic fiber abundantly found in
skin, arterial walls, lung tissue and also found in bones
what is reticular fiber in connective tissue (referred as?, arranged how?, function, what does it bind to)
referred to as immature collagen
arranged in fine bundles (cobweb)
provide support in the walls of blood vessels
help form the basement mem
binds to smooth m. in organs
what forms the framework of organs or glands to which epi cells attach and that is non-elastic, like collagen
reticular fiber
what are the 3 loose connective tissues
areolar ct
adipose tissue
reticular ct
what is areolar ct (where and the function)
ct layer that connects skin to underlying tissues, surrounds blood vessels, n. and organs
provides strength, elasticity and support
what is adipose tissue (where, funtion, subtypes)
found where fat is stored
protective and insulation functions (reduces heat loss)
essential and non-essential fats
what is reticular ct
supporting framework of liver, spleen, lymph nodes, red bone marrow, blood vessels and m.
whats the main difference btw loose ct and dense ct
same elements but dense ct has much more collagen
what are the 3 classifications of dense ct
dense regular ct
dense irregular ct
elastic ct
what type of dense ct is laid down in a regular fashion,, xtracellular matrix looks shiny and white, is strong tissue and forms tendons, aponeuroses and ligs
dense regular ct
why are ligaments and tendons slower to heal ythan m.
because they have fewer blood ve3ssels
what type of dense ct provides a strong attachment btw structures
dense regular ct
what type of dense ct is collagenous fibers and fibroblasts interwoved and irregularly arranged
dens irregular ct
what type of dense ct is often foudn in sheats and forms the m. fascia, found in periosteum and perichondrium
dens irregular ct
what type of dense ct in found in joint capsules, in the dermis of skin and is leather like
dense irregular ct
what type of dense ct consists of elastic fibers and fibroblasts and appears yellowish in color
dense elastic ct
what type of dense ct is found in lung tissue, wall of elastic a. , trachea, vocal cords, some ligamenrts, bronchioles (allows stretching of various o0rgans)
dense elastic ct
