الفهرس 
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Abstract
Arachidonic acid is an unsaturated fatty acid of the type omega-6. arachidonic acid is a carboxylic acid with a 20-carbon chain and four cis-double bonds; the first double bond is located at the sixth carbon from the omega end.
In natural cases, most people will not suffer from a deficiency of this fatty acid unless a bad or low-fat food diet is followed in order to lose weight, or in the event of a defect in the body’s ability to form this fatty acid .
Arachidonic acid is a polyunsaturated fatty acid present in the phospholipids (especially phosphatidylethanolamine, phosphatidylcholine, accounting for roughly 10-20% is abundant in the brain, muscles, and liver. Skeletal muscle is Sources (meat, eggs) or is synthesized from linoleic acid In the body Muscle growth Arachidonic acid promotes the repair and growth of skeletal muscle tissue Arachidonic acid is marketed as an anabolic bodybuilding supplement Supplementation of arachidonic acid (1,500 mg/day for 8 weeks) has been shown to increase lean body mass.
This study was targeted to:
1. Investigated the effect of Arachidonic acid (deficiency & treatment) on calcium deposition and bones density.
2. Compare the results of those groups with the group affected by decrease Arachidonic acid and increase calcium deposition.
3. The Relationship between Arachidonic acid and first time walking in children
4. The Arachidonic acid Relation to thin pupile and bone mass increase.
The study design was as follows:
The experiment was carried out using:
Thirty sex healthy adult male albino rats were fed on standard diet for one week for adaptation. After this week, they were divided into sex groups, each group with similar total body weight and were housed individually in wire cages.