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Hard tissue


noun, plural: hard tissues

(1) Any of the mineralized tissues

(2) A tissue having rigid intercellular substance


In humans, some of the hard tissues include the skeletal bones and cartilages. In other animals, they include antlers, ivories, horns, shells, and other hard bodily structures, in contrast to soft tissues such as muscles.

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Re: Exercise

... stairs, or run from a mean dog, or whatever. Being short of breath is hard on your heart, because the heart pumps oxygen rich blood from the lungs ... the heart has to pump harder or faster to send blood into far more tissue than it was designed for. Many different kinds of illness can affect ...

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by Wallyanna
Tue May 08, 2012 8:06 pm
Forum: General Discussion
Topic: Exercise
Replies: 4
Views: 3002

Re: Theories - Origin of Life

... meaning for the organism, it cannot do anything. Harvard biologist Richard Lewontin describes it as “ a dead molecule among the most nonreactive, ... or domain of the nucleus, and this territorial positioning varies with tissue type and the stage of the organism's development. Chromosomes or parts ...

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by scottie
Wed Feb 22, 2012 8:12 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929133

Re: Creation of species through programmed evolution

... of resolution of several biosoftware programs (each representing a tissue) from a common pool of information stored on the chromosomes of zygote. ... diseases or pesticides are the required changes brought about in hardware (DNA) to execute the program concerned. 2) My theory is based on ...

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by PAWahid
Sat Jan 28, 2012 8:24 am
Forum: Evolution
Topic: Creation of species through programmed evolution
Replies: 15
Views: 11153

Creation of species through programmed evolution

... sensory organs, muscles, etc. A cell is biochip. An organism has both hardware (constituted by chemical structures including DNA) and software, ... chemical or biological information (i.e., program). A baby with diverse tissues develop in mother’s womb through execution of the bioprogram stored ...

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by PAWahid
Mon Jan 23, 2012 3:27 pm
Forum: Evolution
Topic: Creation of species through programmed evolution
Replies: 15
Views: 11153

Re: Incipient Plasmolysis

it's rather hard to detect when a particular cell is at incipient plasmolysis. what we do is that we count the cells in a particular portion of plant tissue. we expose this to a hypertonic solution. when 50% of the cells of the tissue is plasmolyzed, ...

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by angiezenun
Fri Aug 19, 2011 2:25 pm
Forum: Physiology
Topic: Incipient Plasmolysis
Replies: 2
Views: 13331
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