Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Circulatory System - Developmental Changes
We have learnt that throughout foetal life, gas exchange takes place, only through the placenta and not through lungs. Therefore, the foetus has various features in its circulatory systems that are not present in an adult. Diagram is a diagrammatic representation of foetal and infant circulation. In the foetus the oxygenated blood flowing back through the umbilical vein mainly bypasses the liver and goes to the right atrium.
Figure: Changes After Birth in Circulatory System
The blood then passes to the left atrium directly by an opening called foramen ovale. From the left atrium the blood flows to the left ventricle that sends the blood to the head and rest of the body. Blood returning from the head moves by the right atrium to the right ventricle which then does not pump the blood to the lungs but to a shunting vessel the ductus arteriosus that connects along with the descending aorta. A pair of umbilical arteries branch off from the aorta and carry deoxygenated blood to the placenta. At birth the umbilical artery and vein collapse while the cord is tied or the placenta separates, the result of it (here is negative pressure in the right atrium and blood flows back from the left atrium to the right. The flow causes the one way valve to close in the foramen ovale. Thus the left and right atria are separated. The shunting vessels which bypassed the liver and the lungs also collapse and adult pattern of circulation starts. The entire process takes place within a few hours of birth, though the permanent closure of foramen ovale may take up to a year.
Define Types of Root Canal Perforations According to location According to location (level) in relation to crestal bone): Coronal perforation: (supragingival) coronal to
Any elevation in BP is accompanied by increased risk of cardiovascular and cerebrovascular events and renal damage. The most distinctive pathological consequence
Characteristics
Define Termination phase - mechanism of protein synthesis? Termination: RNA polymerase recognizes the terminator, which results in no further nucleotides being incorporated and
Define drug effects on Carbohydrate metabolism? Carbohydrate metabolism: Hypoglycemic drugs such as insulin and sulphonylureas are prescribed because of their ability to increa
Haustorial variations
Define Biosynthesis and Secretion of Thyroid Hormones? Histologically, the functional cells of the thyroid gland are arranged in follicles, which surround a central lumen conta
S p ir ochetosis (tick fever) This is disease of young birds under poor management mostly reared as backyard poultry caused by a spiral bacterium, Borrelia anserina and tr
What is the vector of malaria? How different is its behavior from the behavior of the vector of dengue fever? The vector of malaria is a mosquito of the genus Anopheles, also k
Fever influenza
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd