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- Brain (22060 bytes)
3: ...and body temperature. Functions of the brain are responsible for [[cognition]], [[emotion]], [[memory]...
5: ...ross gaps known as [[synapse]]s. Small invertebrates such as [[insect]]s may have a million [[neuron]]...
9: ... lobes'' that are flanked by two large optical lobes on the left and right (Butler, 2000).
11: ...teristic of animals with more advanced brains. These convolutions evolved to provide more surface are...
14: ...self. [[Stroke]], caused by blockage of [[blood vessel]]s in the brain, is another major cause of dea... - Bone (11388 bytes)
1: ...ium metabolism]], and [[mineral storage]]. The bones of an animal are, collectively, known as the [[sk...
3: [[Evolution]]ary alternatives to bones are [[animal shell|shell]]s and [[chitin]].
6: ...c components (chiefly [[collagen]]). Bone is a [[mesh]], the [[density]] of which may vary at differen...
9: ...are often used interchangeably. Cortical bone makes up a large portion of skeletal mass; but, because...
11: ... often replaced by lamellar bone as growth continues. - Parathyroid gland (1913 bytes)
6: There are two types of cells in the parathyroid glands [[parathyroid ...
9: ...ands are to regulate the calcium level in our bodies within a very narrow range so that the nervous an...
14: ...a cystica]]. Since hyperparathyroidism was first described in 1925, the symptoms have become known as ...
16: ...s often used to determine which parathyroids are responsible for overproduction. - Warm-blooded (3154 bytes)
1: ...[[heat]], but also the ability to cool down if necessary.
2: ...e]] by regulating their [[metabolism|metabolic rates]].
6: ...wing these animals to be active in cold temperatures. On the other hand, the disadvantage is the need...
7: Other living creatures such as fish and reptiles are called ectothermic or [[cold blooded]], meani...
11: ...ess heat to the skin), flushing (circulatory changes to radiate more heat from the skin), panting or [... - Nutrition (42689 bytes)
1: ...d1.png|right|thumb|270px|The updated [[United States Department of Agriculture|USDA]] [[food pyramid]]...
2: ...ionship between [[diet (nutrition)|diet]] and states of [[health]] and [[disease]]. Absence of adequat...
4: ...l and behavioral problems. Moreover, excessive ingestion of elements that have no apparent role in hea...
8: ...r in various forms and combinations (e.g. [[hormones]]/[[vitamins]], [[phospholipids]], [[hydroxyapati...
10: ... juice is eliminated by this process; the intestines reabsorb most of it; otherwise - Sense (11343 bytes)
1: ...physiological methods of [[perception]]. The senses and their operation, classification, and theory a...
5: ...agreed that there are at least nine different senses in humans, and a minimum of two more observed in ...
7: ...o the exact classification of the various cell types and their mapping to regions of the brain.
9: == List of senses ==
11: ... identified. This list begins with those five senses defined by Aristotle and probably most familiar t... - Biology (23579 bytes)
2: ''What are our priorities for writing in this area? To help develop a list...
4: ... wide range of [[Orders of magnitude (length)|scales]].
6: ...and [[histology]]. [[Developmental biology]] studies life at the level of the development or [[ontogen...
8: ... is [[astrobiology]] (or xenobiology) which examines the possibility of life beyond the Earth.
12: ...gn="top"|[[Image:EscherichiaColi NIAID.jpg|90px|''Escherichia coli'']] - Ecology (24417 bytes)
1: ...ludes both the physical properties, which can be described as the sum of local abiotic factors like [[...
4: ...as biology which in this view become sub-disciplines contributing to ecological knowledge.
6: ...nally, a [[holism|holistic view]] of nature is stressed in both ecology and environmentalism.
8: ...logist might approach studying the life of honeybees:
9: ... to the worker [[bee]]s and the [[drone (bee)|drones]]. - Life (11665 bytes)
1: ...y meanings of "life" in [[biology]]. For other uses, see [[Life (disambiguation)]] and [[Living (disa...
3: ...o be alive) and has yet to die; and that which makes a living thing alive.
10: ...s fundamentally difficult and comparable in many respects to the problem of defining [[intelligence (t...
13: ...cies? How are the sizes of cells, organs, and bodies controlled?}}
19: ...ction|Reproduction]], the ability to create entities that are similar to itself
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