Semester Exam: histology connective tissue Flashcards
Fibrocartilage description
Matrix similar, but less firm than hyaline cartilage
Thick collagen fibers predominate
lacunae smaller, squished, big collagen fibers
Fibrocartilage function
Tensile strength and ability to absorb compressive shock
Fibrocartilage location
Intervertebral discs
Pubic symphysis
Discs of knee joint (miniscus)
Bone Tissue function
Supports and protects organs Provides levers and attachment site for muscles Stores calcium and other minerals Stores fat Marrow is site for blood cell formation
bone tissue location
bones
Blood Tissue description
red and white blood cells in a fluid matrix
Blood Tissue function
transport of respiratory gases, nutrients, and wastes
Blood Tissue location
within blood vessels
Blood Tissue characteristics
An atypical connective tissue
Consists of cells surrounded by fluid matrix
Reticular Connective Tissue description
network of reticular fibers in loose ground substance
Reticular Connective Tissue function
form a soft, internal skeleton (stroma) – supports other cell types
Reticular Connective Tissue location
lymph nodes, bone, marrow, spleen
Dense Irregular Connective Tissue description
Primarily irregularly arranged collagen fibers
Some elastic fibers and fibroblasts
Dense Irregular Connective Tissue location
Dermis of skin
Submucosa of digestive tract
Fibrous capsules of joints and organs
Dense Irregular Connective Tissue function
Withstands tension (from multiple directions) Provides structural strength
Dense Regular Connective Tissue description
Primarily parallel collagen fibers (same direction)
Fibroblasts and some elastic fibers
Poorly vascularized (long time to heal)
Dense Regular Connective Tissue function
Attaches muscle to bone (tendon)
Attaches bone to bone (ligament)
Withstands great stress in one direction
Dense Regular Connective Tissue location
Tendons and ligaments
Aponeuroses (sheet of tendons/dense regular)
Fascia around muscles
elastic connective tissue
rare, in aorta, a lot of elastic tissue
Cartilage characteristics
Firm, flexible tissue
Contains no blood vessels or nerves
Matrix contains up to 80% water
Cell type – chondrocyte
Cartilage types
Hyaline (nose, joints)
Elastic (flexible, ear)
Fibrocartilage (least flexible, discs between vertebra)
Hyaline Cartilage description
Imperceptible (cant see) collagen fibers (hyaline = glassy)
Chodroblasts produce matrix
Chondrocytes lie in lacunae
Hyaline Cartilage function
Supports and reinforces
Resilient cushion
Resists repetitive stress
Hyaline Cartilage location
Ends of long bones
Costal cartilage of ribs
Cartilages of nose, trachea, and larynx Location
Elastic Cartilage description
Similar to hyaline cartilage
More elastic fibers in matrix
big lacunae
Elastic Cartilage function
Maintains shape of structure
Allows great flexibility
Elastic Cartilage location
Supports external ear
Epiglottis
Areolar Connective Tissue description
Gel-like matrix with:
all three fiber types (collagen, reticular, elastic) for support
Ground substance is made up by glycoproteins also made and secreted by the fibroblasts.
Cells – fibroblasts, macrophages, mast cells, white blood cells, adipocytes
Highly vascular tissue
areolar connective tissue function
Wraps and cushions organs
Holds and conveys tissue fluid
Important role in inflammation
Main battlefield in fight against infection
areolar connective tissue location
Widely distributed under epithelia
Packages organs
Surrounds capillaries