Connective Tissues and Skin (Q2) Flashcards
cells separated by a matrix of loosely or densely packed intercellular material
connective tissue
what does the matrix of connective tissue consist of?
fibers and loose/ dense ground substance
most abundant fixed cell
fibroblast
large star-shaped fixed cell that produces fibers
fibroblast
irregularly-shaped fixed cells used to engulf invaders and damaged cells
fixed macrophages
fixed fat cells
adipocytes
stem cells that respond to local injury or infection by dividing to produce new cells
mesenchymal cells
produce melanin
melanocytes
macrophages that can circulate throughout connective tissue
free macrophages
free macrophages within the blood
monocytes
small, mobile cells near blood vessels that secrete histamine and heparin to stimulate local inflammation in response to injury
mast cells
migrate throughout the body and increase in number where tissue damage occurs
lymphocytes
can develop into plasma cells and produce antibodies
lymphocytes
migrate throughout the body and respond to chemicals released by macrophages and mast cells. these cells are also phagocytic
microphages
examples of microphages
neutrophils and esinophils
thick fibers that occur in long parallel bundles. can withstand much force when pulled along an axis
collagen fibers
fibers that don’t stain well and are difficult to distinguish in microscpy
collagen fibers
thin fibers that form complex networks and are branched. return to original length after stretching
elastic fibers
highly branched with delicate supporting networks
reticular fibers
fibers able to withstand forces applied from many directions
reticular fibers
what composes the extracellular matrix of connective tissues?
ground substance and fibers
what is the function of areolar connective tissue?
strength, elasticity, and support
what is the function of reticular connective tissue?
forms stroma of organs, binds together smooth muscle, filters/ removes worn-out blood cells in spleen and microbes in lymph nodes
what is the function of adipose connective tissue?
reduces heat loss through the skin, serves as an energy reserve, and supports/ connects organs
what is the function of dense regular connective tissue?
strong attachment between bodily structures that withstand the pulling force along the axis of fibers
what is the function of dense irregular connective tissue?
provides pulling strength in multiple directions
what is the function of elastic connective tissue?
allows the stretching of various organs. strong and can recoil to original shape. important to normal lung and elastic artery function
what is the general function of cartilage?
supporting connective tissues
what is the function of hyaline cartilage?
provides a smooth surface for movement of joints; flex and support
what is the function of fibrocartilage?
provides support and joins structures together with a combination of strength and rigidity
what is the function of elastic cartilage?
provides strength and elasticity and maintains the shape of certain substances
where is areolar connective tissue found?
below epithelium in most parts of the body
where is reticular connective tissue found?
bone marrow, spleen, liver, and lymph nodes
where is adipose connective tissue found?
widely distributed throughout the body
where is dense regular connective tissue found?
tendons, ligaments, aponeuroses, and covering skeletal muscle (deep fasciae)
where is dense irregular connective tissue found?
fibrous capsules of organs and joints, periostea, perichondria, nerve and muscle sheaths; makes up the dermis
where is elastic connective tissue found?
walls of the aorta and other blood vessels, in the vocal cords, surrounding respiratory passages, and ligamenta flava and ligamentum nuchae of spinal column. ofter underlies transitional epithelium.
cartilage cells
chondrocytes
where is hyaline cartilage found?
tracheal rings, costal cartilages of the ribs, cartilage of the nose, larynx and covers bone surfaces at synovial joints
what type of cartilage is tough but flexible?
hyaline cartilage
where is fibrocartilage found?
intervertebral discs, makes up the menisci of the knee joint and in the symphysis pubis
what type of cartilage is flexible and durable?
fibrocartilage
where is elastic cartilage found?
pinna, epiglottis, and auditory canal?
one-third of its matrix consists of collagenous fibers?
bone
fluid connective tissues
blood and lymph
what type of connective tissue has a random arrangement of collagen, elastic, and reticular fibers?
areolar connective tissue
what type of tissue contains only reticular fibers?
reticular tissue
what type of tissue has modified fibroblasts which store fat and become swollen?
adipose tissue
what type of tissue has collagenous fibers in regular, parallel arrangement?
dense regular connective tissue
what type of tissue has irregularly arranged collagenous fibers?
dense irregular connective tissue
what type of tissue has largely elastic fibers with fibroblasts imbedded in between?
elastic connective tissue
unfilled spaces in connective tissue
lacunae
what type of cartilage has tightly packed collagen fibers?
hyaline cartilage
what is the weakest type of cartilage?
hyaline cartilage
what type of cartilage has densely-packed, regularly-arranged fibers?
fibrocartilage
what type of cartilage has irregularly-arranged elastic fibers
elastic cartilage
what type of cartilage has lacuna and chondrocytes in regions?
elastic cartilage
what type of connective tissue is avascular?
cartilage
what type of cartilage has paired chondrocytes?
hyaline cartilage
what type of cartilage is the most durable?
fibrocartilage
areloar connective tissue
areolar connective tissue
areolar connective tissue
areolar connective tissue
adipose connective tissue
adipose connective tissue
adipose connective tissue
adipose connective tissue
reticular connective tissue
reticular connective tissue
reticular connective tissue
reticular connective tissue
reticular connective tissue
dense regular connective tissue
dense regular connective tissue
dense regular connective tissue
dense regular connective tissue
dense regular connective tissue
dense regular connective tissue
dense irregular connective tissue
dense irregular connective tissue
dense irregular connective tissue
dense irregular connective tissue
dense irregular connective tissue
elastic connective tissue