BIO325H5 Lecture Notes - Lecture 1: Heredity, Pleiotropy, Handfish

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Published on 18 Apr 2016
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 
Forms and forces/biomechanics
D’Arcy and Thompson:
o
Ennos: 
Biomechanics:  
Compression and Tension: from Trabeculae to dynamic opmizaon
!"#$ %
& 
o'(#)'%
Bone as material; what is trabecula?
 "
o*+
o,+
o-  .  

o- ( "
-  " 
Numida meleagris Linnaeus, 1766
-+#
% 
o-/ 0+ 
.
-1
o2"#%
o/#/%
o/
o#"%
.3
" 4
Dynamic opmizaon in bone
5 / 
 
o6  .

o'"
Ennos:+"
o " "
7
 7
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Document Summary

D"arcy and thompson: biomechanics is the study of forces in organisms: gives us insight on their form as well. Ennos: how adaptions are constrained by animal or plant movement. Biomechanics: evolution of form by selection constrained by physics. Compression and tension: from trabeculae to dynamic optimization. An apple has a stalk (the little wood bit) that pushes from the center up and then gravity pushing it down: boom compression: relates to newton"s third law of grav (every action has an opp. Bone is a composite material made of a whole bunch working together: extracellular material, matrix of collagen with calcium salts, tissue laid down in embryo by use of fibroblasts and osteocytes. Bone is dynamic: this is why astronauts lose bone density and gain it when they"re back. The trabecula is the forming bones that eventually come together to make the cancellous bone.

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