BODY TISSUES

BODY TISSUES

1. CONNECTIVE

   • loose
     • stores fats, provides insulations
     • lies between other tissues or between organs binding
     • cells made of fibroblasts: large, start shapes cells
     • white fibers, yellow fibers, adipose
   • Dense
     • regular: binds organs together
     • Regular: parallel bundles of collagenous fibers
     • Irregular: Bundles run in different directions
     • Regular: found in tendons and ligaments
     • Irregular: found in inner portion of skin
   • Reticular
     • Store and produce white blood cells
     • Found in lymph nodes, spleen, thymus, and red bone marrow
     • Part of immune system
     • Has reticular cells and reticular fibers

2. MUSCLE

   • Skeletal
     • Striated (striped) and column-shaped cells (muscle fibers)
     • Alternating light and dark bands make striation
     • Attached primarily to bones
     • control voluntary (conscious)
     • contracts quickly, tires easily (fatigable)
     • Allow for wide range of forces to be generated
   • Smooth
     • Spindle-shaped
     • Walls of hollow organs
     • control involuntary
     • contracts rhythmically and quickly
   • Cardiac
     • strong contractions
     • striated appearance
     • under involuntary control
     • rythmic contractions
     • striated and branched
     • heart
     • contraction of heart
     • pumps blood
     • causes the heartbeat
     • control involuntary

3. NERVOUS

   • The ultimate control of all the organ systems is done
   • brain
   • spinal cord
   • peripheral cord
   • controls and coordinated all bodily functions
   • responds to internal and external stimuli

4. EPITHELIAL

   • Squamous
     • simple squamous: single layer of flattened cells
     • lines the lungs
     • blood vessels and heart
     • secretion, absorption, filtration
   • Cuboidal
     • simple cuboidal: single layer of cube-shaped cells attached to a basement membrane
     • stratified cuboidal
     • glands, kidney tubules
     • secretion, absorption
   • Columnar
     • cells that are longer than wider
     • nucleus
     • digestive organ
     • Uterine tubes
     • absorption
     • propel egg to uterus
   • pseudostratified
     • cells appear to be layered
     • each cell touches the basement membrane
     • contain cilia
     • respiratory tract
     • -reproductive tract
     • protection
     • secretion
     • movement of mucus and sex cells
   • transitional
     • change in response to tension
     • urinary bladder
     • ureters
     • urethra
     • stretch