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Blastocyst Embryonic Development - Anatomy & Physiology
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Once sperm has entered the the oocyte, an ootid is formed. During early stages the ootid will contain male and female pronuclei along with the first and second polar bodies. Fusion of the male and female pronuclei will result in a single diploid nucleus or syngamy. Once syngamy has occurred, the zona pellucida then develops into an imprenetrable layer that prevents polyspermy and so polyploidy. Once the zona pellucida has developed, the ootid is now referred to as a zygote (diploid) and will begin undergoing mitotic divisions via a cleavage process that will begin to give rise to daughter cells called blastomeres. These cleavage divisions will begin to produce a 4-celled embryo and then an 8-celled embryo.

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02/05/2015
Blood Brain Barrier - Anatomy & Physiology
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The Blood Brain Barrier refers to the mechanisms in place around the microvasculature of the brain to ensure optimal neural functioning. Endothelial cells are the structural basis of the blood brain barrier and are joined by tight cellular junctions formed by the transmembrane proteins the occludins and the claudins.

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Blood Cells - Overview
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Blood cells develop in the bone marrow from a common stem cell in the process known as haematopoiesis. Once mature, cells are divided into groups that reflect their morphological and functional characteristics including the erythrocytes, or red blood cells, the granulocytes, the agranulocytes and the megakaryocytes.

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02/11/2015
Blood Pressure
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This page has links to many topics centered around blood pressure: blood pressure measurement, physiology, kidney control of blood pressure, renal blood pressure, and the renin angiotensin aldosterine system

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Bone & Cartilage Development - Anatomy & Physiology
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Osteogenesis is the formation of bone. Bone forms from one of three lineages; the skull forms from the neural crest; the limb skeleton forms from the lateral plate mesoderm; and the axial skeleton forms from the paraxial mesoderm (sclerotome).

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Bovine Anaesthesia
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Due to their size and anatomy, cattle are not very good candidates for general anaesthesia meaning that many procedures performed use local techniques. Most surgeries performed on these patients can be done standing with a small amount of sedation and regional and local nerve blocks. Local techniques are also used in cattle for procedures such as castration and dehorning. General anaesthesia is rarely carried out in these species.

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02/27/2015
Bronchi and Bronchioles - Anatomy & Physiology
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The trachea bifurcates at the levels of the 4th-6th intercostal space, approximately halfway between the thoracic inlet and the diaphragm. It divides into two principle bronchi, tubes which conduct air into the lungs, and they divide into two lobar bronchi for the left lung, and into four lobar bronchi for the right lung. These further divide into smaller bronchi and bronchioles within the lung tissue.

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Bursa of Fabricius
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The Bursa of Fabricus is a primary lymphoid organ found in birds. The bursa was the first place that a certain subset of lymphocytes was observed and consequently they were named B lymphocytes (bursa of Fabricius or bursa equivalent organs). The bursa is involved in the differentiation of B lymphocytes.

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CNS Development - Anatomy & Physiology
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Development of the Central Nervous System (CNS) includes development of the brain, spinal cord, optic and auditory systems, as well as surrounding supporting cells including ependymal cells, astrocytes, oligodendrocytes and microglia. Information within this page will exclude development of the Peripheral Nervous System (PNS) which includes nerve and ganglia formation.

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CNS Vasculature - Anatomy & Physiology
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Blood is supplied to the brain from a ventral arterial supply in all species; from a circle of arteries called the Circle of Willis (also called the cerebral arterial circle or arterial circle of Willis) which lies ventrally to the hypothalamus where it forms a loose ring around the infundibular stalk. Although the appearance of the circle of Willis is fairly constant amongst mammals, the sources of blood supply to the circle and the direction of flow around the circle are very species specific. Blood is supplied to the brain by the internal carotid artery in dogs and horses whilst in other domestic species the main blood supply is from branches of the maxillary artery.

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Caecum - Anatomy & Physiology
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The cecum is a blind ending diverticulum of the large intestine and it exists at the junction of the ileum and the ascending colon. Its size and physiological importance varies between species. It is a site of microbial fermentation, absorption and transportation.

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Camelid Anaesthesia
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Camelids are becoming more common in general practice and so an understanding of anaesthesia techniques is becoming more important. The same techniques used in other species can be adapted and used in camelids including both local and general anaesthesia.

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02/27/2015
Camelid Stomach - Anatomy & Physiology
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Camelids have a similar digestive structure to other ruminants, although camelids only have three separate stomach compartments compared to the four found in domestic species. The first element of the camelid GI tract, known as C1, can be compared to the rumen whilst the second, known as C2 can be compared to the reticulum. The final element of the tract, C3 can be compared to the abomasum. Therefore camelids do not have a structure comparable to an omasum.

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Cardiorespiratory System Overview - Anatomy & Physiology
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The mammalian cardiovascular and respiratory systems have evolved primarily to provide the tissues of the body with oxygen and to remove carbon dioxide. The cardiorespiratory system also has metabolic and heat exchange roles.

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Care plans
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Written nursing care plans ensure that the nurse responsible for patient care at any time during the animal's stay in the practice is confident to manage and treat the patient, to talk to the owners and give accurate updates on their animal's care, and to feel that the best possible care has been given to the animal at all times. Care plans require skill to write and this is something that improves with practise.

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Date Added:
02/27/2015
Carnivore Mammary Gland - Anatomy & Physiology
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Each mammary complex consists of 5-20 mammary units and their corresponding ducts. The ducts open separately on the tip of the teat. Shallow grooves indicate the border between complexes. An intermammary sulcus divides the right from the left row.

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Category:Lower Urinary Tract - Anatomy & Physiology
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The lower urinary tract is the collection of organs which convey the formed urine from the kidneys to the exterior of the body. The urine is not altered in this part of the system in species other than the horse (where mucous is added) but instead its function is to collect and store the urine until enough of it is collected for release to become necessary. This gives the animal urinary continence. Three major structures make up this tract. The ureters, the bladder and the urethra.

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Category:Lymphoreticular System
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Also referred to as the reticuloendothelial system or mononuclear phagocytic system. It is comprised of primary lymphoid organs (bone marrow, Bursa of Fabricius, the foetal liver and the thymus) which are responsible for the production of lymphocytes, and the secondary lymphoid organs (lymph nodes, spleen and mucosal associated lymphoid tissue) which function to provide an environment where lymphocytes can react to antigen from the tissue fluid, blood and mucosal surfaces.

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