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- Immune system (14564 bytes)
1: ...e narrow sense, many higher organisms have organs dedicated to the maintenance of immunity, such as th...
3: It is often divided into the two sections of innate and adaptive imm...
6: .... While study of the bacterial immune system provides useful insights into immunology, higher organism...
8: ...e immune system is an organ system that acts as a defense against foreign [[pathogen]]s (such as [[vir...
11: ...rders ([[immunodeficiency]] and [[autoimmune disorder|autoimmunity]]) arise from failures of discrimin... - Retina (13061 bytes)
5: ...ant part in [[visual perception]]. In [[embryonal development]], the retina and the optic nerve origin...
9: ...s in the retina have been used for [[biometric]] identification.
12: ... the peripheral retina. The edge of the retina is defined by the [[ora serrata]]. The length from one ...
14: ...heir axons. This spatiotemporal pattern of spikes determines the raw input from the eyes to the brain....
20: ...rs of [[neuropil]]s where synaptic contacts are made. The neuropil layers are the outer [[plexiform]] ... - Kidney (12846 bytes)
1: ...:29-08-07 08a.jpg|thumb|250px|Kidney Clipart provided by [http://classroomclipart.com Classroom Clip A...
7: ...] part of the [[abdomen]]. There is one on each side of the [[spine (anatomy)|spine]] just below the [...
9: ...ey usually lies slightly lower than the left in order to accommodate the [[liver]].
11: ...twelfth [[rib]]s, and each whole kidney is surrounded by two layers of fat (the perirenal fat and the ...
14: ===Structural details=== - Liver (11441 bytes)
1: ... has a number of functions in the body including detoxification, [[glycogen]] storage and [[plasma pr...
5: ...men. The liver lies [[anterior]] to the [[gallbladder]] and superior to the right [[kidney]].
9: ...of the bile ducts resemble those of a tree, and indeed the term "biliary tree" is commonly used in thi...
14: ...surface landmarks. Traditional gross anatomy divided the liver into four lobes based on surface featu...
16: ... front ([[anterior]] side) of the liver. This divides the liver into a left anatomical lobe, and a rig... - Coral reef (11599 bytes)
2: ... forms: shallow water reefs and deep water reefs. Deep water reefs have only recently been discovered,...
4: ...''coral reef''' is a type of [[reef|biotic reef]] developing in [[tropical]] waters. Although [[coral]...
6: ... temperature of 20-28 [[?C]] (68-82 [[?F]]) is needed for the growth of the coral reef. Coral reefs ar...
8: Such reefs take a variety of forms, defined as follows:
19: ...an environment of exceptionally high biodiversity despite relatively poor nutrient availability. - Cornea (4779 bytes)
3: ...the outside and the [[aqueous humour]] at the inside. In [[human]]s, the cornea has a diameter of abou...
9: ... Here they are listed from the outside to the inside:
17: * '''Posterior limiting membrane''' (also '''Descemet's membrane'''): a thin acellular layer that...
19: ...r lining acting as a barrier to prevent water inside the eyeball from moving into and hydrating the co...
21: The cornea is composed mostly of dense connective tissue, similar to the surrounding ... - Hydroponics (15454 bytes)
3: ... is also very easy to do; the activity is often undertaken by very young children with such plants as ...
7: ...ess time and sometimes of higher quality, which under certain economic and environmental conditions, m...
9: ...over conditions, maximum density, and low risk of detection; as a result, many [[marijuana]] growers u...
13: ...ed various substances which the plants needed besides water. In the mid-[[19th century]], the German p...
15: ...ericke of the [[University of California, Davis]] demonstrated that plants could be grown soil-free al...
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