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 need of vitamin C during pregnancy period? Vitamin C deficiency has not been shown to affect the course or outcome of pregnancy in humans, although low plasma levels hav
Use of biotechnology in characterization of animal biodiversity. Genetic uniqueness of populations is measured by the relative genetic distances of such populations from each o
STERNU M - It is long, naroow, flat vertical bone in the middle of the front wall of the chest. 15 cms long. It is dagger shaped having manubrium body & xiphoid process.
Terminal process of diseased stage This is the last stage in the process of disease. In this stage, the disease process is halted either temporarily or permanently. There are t
Q. What is Sick Sinus Syndrome? Ans. When a slow resting pulse fails to accelerate normally with exercise, it has been labeled chronotropic incompetence, however, there i
Length of the Implant Used The length of the implant to be used is dictated by the available bone height. The success rate is proportional to the implant length and the quality
State about the blood-aqueous barrier There is a blood-aqueous barrier which prevents the movement of substances from the plasma to the aqueous humour. If there is a breakdown
what is the responding variable in catalyst to change oil molecules
how nematodes adapt to their mode of feeding
Q. What is primary structure of a protein? What is the significance of the primary structure? The primary protein structure is the linear sequence of amino acids that outline t
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