Monday, April 25, 2011

Unit 11: Body Tissues, Excretion, and Digestion

Anatomy = the study of the structure of an organism and its parts.
Physiology = the study of the function of these structures.

5 Levels of Organization:
  • Cellular Level
  • Tissue Level
  • Organ Level
  • Organ System Level
  • The Organism Itself
Four Main Types of Tissues
1. Epithelial
3. Muscle
4. Nervous
Epithelial Tissue:
covers surface of body, lines organs and cavities
*replaced completely every two weeks*
Connective Tissue:
sparse; scattered through an extracellular matrix; six major types
  1. Loose Connective Tissue (webbed)
  2. Adipose Tissue (fat)
  3. Blood
  4. Fibrous Connective Tissue
  5. Cartilage
  6. Bone
Loose: holds organs in place; loose weave, but strong; has elastic fibers -
"Snap it while you can!" - Christine Kim
Adipose: stores fat; fat bubbles expand when fat is consumed
Blood: red and white blood cells in plasma(liquid)
Fibrous: forms tendons(muscle to bone) and ligaments(bone to bone)
Cartilage: rubbery, but strong; heals slowly
"Sharks are made entirely of cartilage." - James Cho
Bone: rigid with calcium deposits; hard, but not brittle
Muscle Tissue:
MEAT! contract when stimulated by a signal
-3 types:
Skeletal: voluntary, striated(alignment), fixed number(weight lifting only expands)
Cardiac: only in the heart; striated, involuntary(do not have to think to make heart beat)
Smooth: walls of organs, blood vessels; involuntary, not striated
Nervous Tissue:
sends information from one body part to another

"Open" System
we exchange chemicals and energy with surroundings continuously

In = nutrients and oxygen
Out = waste and carbon dioxide
We exchange indirectly via our circulatory system

It means keeping a steady state - internal body maintains constant conditions even when external environment changes.

Next Scribe: Nick.


  1. although it's not that hard to remember, i like to remember "homeostasis" by saying "homeostability".

    random fact: man meat (human muscle tissue) is the only meat that is perfectly balanced in nutrients since we eat all of them!

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  3. I really liked how you organized the notes!
    The highlighted words, bullet points, and the different sizes of words. It helped me to review the major points. I tried to make my post organized like yours. :)

  4. i like how you listed all the different kinds of tissues.. its easy to get them mixed up :)
    p.s. im serious. snap it while u can!!! ;)

  5. this is organized very nicely and is really good for reviewing all the terms. you made it seem really simple