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This is the amount of blood that is returned to the heart by the veins. This is influenced by various factors. Inspiration decreases the pressure in the central veins and thus increases the pressure gradient between the peripheral and central veins thus augmenting venous return. Skeletal muscle contraction also milks the venous flow towards the heart and the valves in the veins prevent gravitational return backwards. Significant veno dilatation can occur with conditions like sepsis and the use of certain drugs like nitrates. This can result in a serious fall in venous return. This can result in marked deterioration in conditions like right ventricular infarction and pericardial tamponade.
Signify the term Metacoel. The last of three coelomic spaces found in tripartate body plan characteristic of deuterostome lineage of animals. Other coelomic compartments are th
Explain about Hypothalamus Another important part of brain is hypothalamus. It is very small in sie. It controls many important functions which are as follows: Blood pre
To which heart chamber does the blood go after leaving the left atrium? What is the valve that separates these compartments? The arterial blood that has come from the lungs to
What is an evolutionary tree? Is there a precise evolutionary tree known by science that explains the emergence and origin of every type of living being? Evolutionary tree is t
What is a phenotype? A phenotype is each observable characteristic of a living being conditioned by its genes. Some phenotypes may be changed by nongenetic factors (for instanc
Give an example of how two organisms are interdependent.
How plants use the pattern of changes in day/night length to solve the paradox that day length is equal twice a year. Plants possess the ability to balance the daily changes in
Why is the uricotelic excretion essential for avian and reptile embryos? In reptiles and birds the excretory system is uricotelic as uric acid is insoluble, less toxic and sui
Q. What are the symptoms of diverticulosis? Depending on the site of diverticula the symptoms may appear. It occurs most often in sigmoid colon and frequency increases with age
Q. What is the glycolysis? And what are the products of this process? Glycolysis, the first stage of the aerobic cell respiration is a process in which glucose is degraded brok
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