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- Brain (22060 bytes)
3: ...coordinates most [[movement]], [[behavior]] and [[homeostasis|homeostatic]] body functions such as heartbeat, b...
5: ...icals called [[neurotransmitter]]s across gaps known as [[synapse]]s. Small invertebrates such as [[i...
9: ...s ''circumesophageal lobes'' that are flanked by two large optical lobes on the left and right (Butle...
11: ...more surface area for a greater number of neurons while keeping the volume of the brain compact enoug...
14: .... Often in these cases, more damage is caused by swelling, or [[edema]], than by the impact itself. ... - Bone (11388 bytes)
1: ...e]]. The bones of an animal are, collectively, known as the [[skeleton]].
5: ==General overview==
6: ...llagen]]). Bone is a [[mesh]], the [[density]] of which may vary at different [[points]].
9: ...tal mass; but, because of its density, it has a low surface area. Cancellous bone is trabecular (hone...
11: ...ven bone is often replaced by lamellar bone as growth continues. - Parathyroid gland (1913 bytes)
3: ...here are four parathyroid glands but have been known to number six or eight.
6: There are two types of cells in the parathyroid glands [[parat...
9: ...he calcium level in our bodies within a very narrow range so that the nervous and muscular systems ca...
12: ...parathyroid hormone receptor have been associated with [[Jansen's metaphyseal chondroplasia]] and [[B...
14: ...st described in 1925, the symptoms have become known as "[[moan]]s, [[groan]]s, [[Kidney stone|stone]... - Warm-blooded (3154 bytes)
1: ...generate [[heat]], but also the ability to cool down if necessary.
2: Also known as '''endotherms''', warm-blooded animals control their [[body temperatu...
6: ...], even during inactivity, otherwise the organism will die.
7: ... cannot control their internal temperature and so were assumed to have the same temperature as their ...
9: ...hey may pant, [[sweat]], lick, or seek shelter or water. - Nutrition (42689 bytes)
2: ...'' is a science which studies the relationship between [[diet (nutrition)|diet]] and states of [[heal...
4: ...s [[scurvy]], [[obesity]] or [[osteoporosis]], as well as psychological and behavioral problems. More...
5: ...ience of nutrition attempts to understand how and why specific dietary aspects influence health.
7: ==Overview==
8: ...body]] comprises [[chemical compounds]] such as [[water]], [[amino acids]] ([[proteins]]), [[fatty ac... - Sense (11343 bytes)
5: ...ine different senses in humans, and a minimum of two more observed in other organisms.
7: ...eceived and interpreted". Where disputes arise is with regard to the exact classification of the vari...
11: ...everal senses can be identified. This list begins with those five senses defined by Aristotle and pro...
13: ...n of brain to interpret sensory input to derive new information from it.
15: ...r frequencies than can be heard are detected this way only. - Biology (23579 bytes)
2: ...of the most basic topics in biology, please see [[Wikipedia:biology basic topics]].''
4: ...ent disciplines. Together, they study life over a wide range of [[Orders of magnitude (length)|scales...
8: ...e new field is [[astrobiology]] (or xenobiology) which examines the possibility of life beyond the E...
10: <div style="width:200px;">
19: ...0px;">Biology studies the variety of life ''(clockwise from top-left)'' ''[[E. coli]]'', tree [[fern]... - Ecology (24417 bytes)
1: ...itat (ecology)|habitat]]. The term ''oekologie'' was coined in [[1866]] by the German biologist, [[E...
4: ...ome sub-disciplines contributing to ecological knowledge.
6: ...ntal issues. Additionally, a [[holism|holistic view]] of nature is stressed in both ecology and envir...
8: Consider the ways a biologist might approach studying the life o...
9: ... of the [[queen bee]], and how she relates to the worker [[bee]]s and the [[drone (bee)|drones]]. - Life (11665 bytes)
3: ...blished to be alive) and has yet to die; and that which makes a living thing alive.
6: ...meaning of this existence and the purpose of this whole universe. Saurabh Nair
9: How can one tell when an entity is a living thing?
10: ...ne's only concern were life on [[Earth]] as we know it (see [[biosphere]]), but as soon as one consid...
13: ...ction? How do organisms recognize like species? How are the sizes of cells, organs, and bodies contro...
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