Morphological Studies on the Choroid Plexus in Balady Goat (Capra hircus)

The lateral ventricle choroid plexus could be subdivided according to its vascular pattern into caudal part, middle part and rostral part (villus fringes), The two narrow bands which arose from the choroid plexuses of the lateral ventricles passed in the interventricular foramen, forming the choroid plexus of the third ventricle, each band appeared under stereomicroscope as down folding liner tufts reaching the level of pineal body. The third and fourth ventricles choroid plexuses consisted of a large number of leaveslike processes connected to a more basal core of the stromal tissue by a stem. Secondary leaf-like elevations might arise from primary leaves. The stromal tissue extended into the leaves accompanied by vessels which brake up into capillary plexuses in the body of the leaves. The highly vascular stroma of the choroid plexus covered with a single layer of cuboidal epithelium almost ciliated, with an average height 9.55 μm. The covering epithelium constitutes about 19.5 %, 31.9 % and 31.8% of the total bulk of the choroid plexuses of the lateral, third and fourth ventricles respectively. Relatively large amount of connective tissue separated the blood vessels from the epithelium representing about 30.1% of the total bulk of the lateral ventricle choroid plexus. While it represented about 28.7%, and 39.8 % in third and fourth ventricles choroid plexuses respectively, its main component was formed of collagen bundles. The connective tissue stroma sometimes appeared very thin that allowed apposing of the endothelium of the blood vessels with the basement membrane of the choroidal cells. The connective tissue stroma characterized by Animal species in this issue Chicken (Gallus gallus domesticus) The chicken (Gallus gallus domesticus) is a domesticated fowl, a subspecies of the Red Junglefowl. As one of the most common and widespread domestic animals, and with a population of more than 24 billion in 2003, there are more chickens in the world than any other species of bird. Humans keep chickens primarily as a source of food, consuming both their meat and their eggs. Chickens are omnivores. In the wild, they often scratch at the soil to search for seeds, insects and even larger animals such as lizards or young mice. Chickens may live for five to ten years, depending on the breed. In commercial intensive farming, a meat chicken generally lives six weeks before slaughter. A free range or organic meat chicken will usually be slaughtered at about 14 weeks. Hens of special laying breeds may produce as many as 300 eggs a year. After 12 months, the hen's egg-laying ability starts to decline, and commercial laying hens are then slaughtered and used in processed foods, or sold as "soup hens". The world's oldest chicken, a hen, died of heart failure at the age of 16 according to the Guinness Book of World Records. Domestic chickens are not capable of long distance flight, although lighter birds are generally capable of flying for short distances, such as over fences or into trees (where they would naturally roost). Chickens may occasionally fly briefly to explore their surroundings, but generally do so only to flee perceived danger.