Connective Tissue Flashcards
3 kinds of connective tissue
- Loose connective tissue
- dense connective tissue
- Cartlage
Loose connective tissue
Areolar
Adipose
Reticular
Areolar connective tissue
Description: made of all fibers, forms subcutaneous layer
Location: in/around every body structure and subcutaneous layer
Function: strength, elasticity, and support
Adipose connective tissue
Description: has cells called adipocytes (adipo = fat) specialized in storing fats; more adipose =more blood vessels
Location: wherever areolar tissue is found, forms subcutaneous layer; around ❤️ and kidneys, yellow bone marrow, padding around joints and eye sockets
Function: reduces heat loss, serve as energy reserve, support and protect organs
Reticular connective tissue
Description: fine interlacing network of reticular fibers and reticular cell
Location: stroma (supporting framework) of liver, spleen, lymph nodes; red bone marrow, part of basement membrane; and blood vessels and muscles
Function: forms stroma of organs; binds together smooth tissue cells; filters and and removes worn out blood cells in spleen and microbes in lymph nodes
3 types of dense connective tissues
Dense regular
Dense irregular
Elastic
Dense regular
Description: extracellular matrix looks shiny white; consists of collagen fibers arranged in bundles; fibroblasts between blasts
Location: form tendons (muscle- bone), ligaments (bone- bone), and aponeuroses (muscle- muscle)
Function: provides strong attachment between various structures. Resist tension
Dense irregular connective tissue
Description: consist of mostly collagen fibers randomly arranged and a few fibroblasts
Location: faciae (tissue beneath skin and around muscles and other organs), deeper region of dermis of skin, periosteum of ❤️ and ❤️ valve
Function: provides tensile (pulling) strength in many directions
Elastic connective tissue
Description: consists predominately of elastic fibers; fibroblasts are present in spaces between fibers; unstained tissue is yellowish
Location: Lung tissue, walls of elastic arteries, trachea, bronchial tubes, true vocal chords, suspensory ligaments of penis, and some ligaments between vertebrae
Function: allows stretching of various organs; is strong and can recoil to original shape after being stretched.
3 types of cartilage
Hyaline
Fibrocartilage
Elastic
Hyaline
Description: consists of a resilient gel as ground substance and appears in the body as a bluish white shiny substance. Fine collagen fibers are not visible with ordinary staining techniques; prominent chondrocytes are found in lacunae
Location: ends of long bones, anterior end of ribs, nose, part of larynx, trachea, bronchi, bronchioles tubes, and embryonic and fetal skeleton
Function: provides a smooth substances for movement at joints, as well as flexibility and support; weakest type of cartilage
Fibrocartilage
Description: consists of chondrocytes scattered among clearly visibly thick bundles of collagen fibers with extracellular matrix; lacks perichondrium
Location: pubic symphysis (point where hip bones join anteriorly), intervertebral discs (discs between vertebrae), menisci (cartilage pads) of knee, and portions of tendons that insert into cartilage
Function: support and joining structures together. Strength and rigidity make it the strongest type of cartilage.
Elastic cartilage
Description: consists of chondrocytes located in a threadlike network of elastic fibers within the extracellular matrix; perichondrium present
Location: lid on top of the larynx (epiglottis), part of external ear (auricle) and auditory (eustachian) tubes
Function: provides strength and elasticity; maintains shape of certain structures.
