Lecture 4b: tissues 2 Flashcards
(26 cards)
connective tissue [define (2); function (3)]
- most abundant in the body
- consists of ground substance, fibers and relatively very few cells
- protection
- supports and binds other tissue together
- provides metabolic needs of other tissues
types of connective tissue (5)
- connective tissue proper
- cartilage
- bone
- blood
- muscle
loose [areolar] connective tissue proper [define (3); location (4)]
- abundant intercellular material
- few cells/ scattered fibers
- very vascular and flexible
- distributed throughout the body
- packing material around organs
- surrounds muscle and blood cells
- binds skin to underlying muscle
dense connective tissue proper [define (3); location (3)]]
- large # of collagen fibers packed closely together
- poor blood supply
- strong but flexible
- ligaments
- tendons
- outer covering of the eye [sclera]
regular/ irregular dense connective tissue proper
- regular = fibers parallel to each other
- irregular = fibers poorly arranged
elastic connective tissue proper [define (2); location (4)]
- contains many irregularly arranged elastic fibers
- can be easily stretched and returned to original size
- walls of arteries
- larynx
- trachea
- bronchi
adipose connective tissue [define; location]
- composed of fat cells filled with lipid
- located throughout the body
cartilage is composed of (3)
- intercellular material [matrix]
- cells [chondrocytes]
- fibers
perichondrium (2)
- tough, outer CT covering
- goes completely around cartilage and encases it
cartilage (is/ is not) avascular
cartilage is avascular
chondroitin sulfate
intercellular material of cartilage
cells [chondrocytes] of cartilage live in ____
a small space called lacunae
types of cartilage (3)
- hyaline cartilage
- fibrocartilage
- elastic cartilage
hyaline cartilage [define (2); location (2)]
- forms cartilaginous skeleton that serves as a model during fetal development
- articular cartilage = covers surface of long bones at a joint
- nose/ trachea/ bronchi [portions of respiratory tract]
- ends of ribs
fibrocartilage [define (2); location (3)]
- contains more fibers and is able to withstand compression
- fibers are arranged in parallel bundles = increased tensile strength
- in intervertebral disk
- symphysis pubis
- meniscus of the knee joint
elastic cartilage [define (1); location (3)]
- contains numerous elastic fibers for increased elasticity
- auditory [estachian] tube
- external ear
- larynx epiglottis
bone [definition (1); composition (2)]
- rigid connective tissue that forms skeletal support of the adult body
- intercellular material = inorganic [protein] and organic [calcium salts]
- cells = osteocyte; osteoblast; osteaoclast
plasma
intercellular material of blood
muscle is composed of ___
muscle is composed of fibers [long thin cells which contain contractile protein (actin and myosin)]
ground substance (2)
- part of the matrix of connective tissue
- serves as a pathway for transport/ exchange of nutrients/ waste products between the blood and tissue cells
types of fiber (3)
- collagenous = flexible yet strong; composed of protein collagen
- elastic = capable of stretching and snapping back; composed of protein elastin
- reticular = thin threads; form a delicate mesh-like network
fibroblast (2) produces what?
- most abundant
- star/ elongated cell
- produces and maintains CT fibers
adipocytes [fat cells] (2)
- stores fat/ lipids
- cushioning mechanism/ energy source
macrophages [phagocytes]
- engulf bacteria/ debris to lysize (digest) them
