The Human Development Index (HDI) is a combined statistical comparison or average comparison of education, per capita income indications and life expectancy and is used to rank the countries into tiers or levels of development.
A country with higher HDI score will have higher lifespan of people, higher GDP or per capita income and higher education. Mostly the developed countries will have high HDI.
According to the data available for 2014 the HDI ratings of the countries are: Norway at first position followed by Switzerland, Australia, Germany and Singapore and so on.
Answer
Ventricular systole begins during the <u>isovolumetric contraction </u>phase of the cardiac cycle.
Explanation
1. Ventricular ejection
The forceful expulsion of blood from the ventricles into the aorta and the pulmonary arteries.
2. Isovolumetric contraction
The interval between the closing of the AV valves and the opening of the semilunar valves (aortic and pulmonary valves) is known as isovolumetric contraction. it is the beginig of systole. it is the first chamber systolic event. The myocardial muscle fibers have begun to shorten but have not developed enough pressure in the ventricles to overcome the aortic and pulmonary end-diastolic pressures and open the aortic and pulmonary valves. During this period of muscle fiber contraction, the ventricular volumes do not change.
3. Ventricular filling
In this stage AV valve is opened and the blood that has accumulated in atria flow rapidly into ventricles. The ventricular volume increase rapidly. A third heart sound known as S3 is heared during this stage.
4. Isovolumetric relaxation
It is the beginning of diastole. The AV valve are closed at beginig. The atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually. The pressure in the ventricles continues to drop. Ventricular volume is at a minimum and is ready to be filled again with blood.
Answer:
C. Height
Explanation:
The volume of a rectangle is Length x width x height.
The student has only measured the width and length so far, the only thing left to measure is the height.
The other answers don't make sense.
<em>Hope this helps!!</em>
<em>- Kay :)</em>
Answer:
Baking soda in vinegar
Explanation:
Cause soda is a base and vinegar an acid which will neutralise each other
Answer:
The answer is: All of the cells of the sea star have the same exact DNA (I think)
Explanation:
