A.R.Siranjeevi /SAT creation

A  lunar eclipse   https://truthmedia-ct.blogspot.com/?m=1 occurs when the  Moon passes directly behind  Earth  and into  its shadow . [1]  This can occur only when the  Sun , Earth, and the Moon are aligned (in  syzygy ) exactly or very closely so, with the  planet  in between. Hence, a lunar eclipse can occur only on the night of a  full moon . The type and length of an  eclipse  depend on the Moon's proximity to  either node  of  its orbit . During a total lunar eclipse, Earth completely blocks direct  sunlight  from reaching the Moon. The only light  reflected  from the lunar surface has been  refracted  by  Earth's atmosphere . This light appears reddish for the same reason that a  sunset  or  sunrise  does: the  Rayleigh scattering  of bluer light. Due to this reddish color, a totally eclipsed Moon is sometimes called a  ...

A  lunar eclipse   https://truthmedia-ct.blogspot.com/?m=1 occurs when the  Moon passes directly behind  Earth  and into  its shadow . [1]  This can occur only when the  Sun , Earth, and the Moon are aligned (in  syzygy ) exactly or very closely so, with the  planet  in between. Hence, a lunar eclipse can occur only on the night of a  full moon . The type and length of an  eclipse  depend on the Moon's proximity to  either node  of  its orbit . During a total lunar eclipse, Earth completely blocks direct  sunlight  from reaching the Moon. The only light  reflected  from the lunar surface has been  refracted  by  Earth's atmosphere . This light appears reddish for the same reason that a  sunset  or  sunrise  does: the  Rayleigh scattering  of bluer light. Due to this reddish color, a totally eclipsed Moon is sometimes called a  ...

SARS (servere actie respiratory https://truthmedia-ct.blogspot.com/?m=1 syndrome) Severe acute respiratory syndrome ( SARS ) is a viral  respiratory disease  of  zoonotic  origin caused by the  SARS coronavirus  (SARS-CoV). It first appeared in China in November 2002 and was identified in February 2003. SARS spread to over 24 countries before it was contained. Since May 2004,  no new cases  have been reported. From November 2002 to July 2003, there were  8,098  cases worldwide and 774 deaths.      * Why do we worry about zoonotic diseases? SARS was the first coronavirus to present severe symptoms in humans. Diseases that pass from animals to humans are called zoonotic diseases. They are relatively rare. The main concern when they first emerge is that they are new strains and also new to humans, so the human body does not yet have immunity. It is often impossible to predict what may happen...

What Is Anemia? Anemia  is a condition that develops when your blood lacks enough healthy red  blood cells  or  hemoglobin . Hemoglobin is a main part of red  blood cells  and binds oxygen. If you have too few or abnormal red blood cells, or your hemoglobin is abnormal or low, the cells in your body will not get enough oxygen.  Symptoms of anemia  -- like  fatigue  -- occur because organs aren't getting what they need to function properly. Anemia  is the most common blood condition in the U.S. It affects about 5.6% of the people in the U.S. Women, young children, and people with chronic diseases are at increased risk of anemia. Important factors to remember are: Human blood from a case of  iron-deficiency anemia Certain forms of anemia are hereditary and infants may be affected from the time of birth. Women in the childbearing years are particularly susceptible to iron-deficiency an...

     Hypertension Definition Hypertension is high blood pressure. Blood pressure is the force of blood pushing against the walls of arteries as it flows through them. Arteries are the blood vessels that carry oxygenated blood from the heart to the body's tissues. Description As blood flows through arteries it pushes against the inside of the artery walls. The more pressure the blood exerts on the artery walls, the higher the blood pressure will be. The size of small arteries also affects the blood pressure. When the muscular walls of arteries are relaxed, or dilated, the pressure of the blood flowing through them is lower than when the artery walls narrow, or constrict Blood pressure is highest when the heart beats to push blood out into the arteries. When the heart relaxes to fill with blood again, the pressure is at its lowest point. Blood pressure when the heart beats is called systolic pressure. Blood pressure when the heart is at rest is calle...