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Cardiovascular System The cardiovascular system is responsible for transporting nutrients and removing gaseous waste from the body. This system is comprised of the heart and the circulatory system. Structures of the cardiovascular system include the heart, blood vessels, and blood. The lymphatic system is also closely associated with the cardiovascular system. Structures of the Cardiovascular System Heart The heart is the organ that supplies blood and oxygen to all parts of the body. This amazing muscle produces electrical impulses through a process called cardiac conduction. These impulses cause the heart to contract and then relax, producing what is known as a heart beat. The beating of the heart drives the cardiac cycle which pumps blood to cells and tissues of the body.  Blood Vessels Blood vessels are intricate networks of hollow tubes that transport blood throughout the entire body. Blood travels from the heart v

Having a high cholesterol level increases your risk of cardiovascular disease, including heart disease and heart attacks. Making lifestyle changes such as increasing physical activity and losing weight can help lower   your  cholesterol.  Besides you might be able to boost the cholesterol-lowering ability of your diet even more. Research studies indicate certain foods contain natural compounds that can reduce cholesterol, usually by lowering the LDL (the ‘bad’ cholesterol) levels in your blood stream. Oats Eating a diet rich in whole grains is associated with having healthier cholesterol levels. Oats contain a soluble fiber called beta-glucagon. If you currently have high cholesterol levels, oats can lower cholesterol by as much as 20 percent. Oats and oatmeal are also an excellent source of minerals and protein. Walnuts. Walnuts are rich in both monounsaturated and omega-3 fatty acids. Eating these nuts may be able to reduce cholesterol levels by

Researchers     from m the  University   of  Cambridge  jn  association  with  Boeing,  have  successfully   tested  the  world's   first  aircraft    powered  by   a parallel    hybrid  -electric   system. An  electric  motor  and  petrol  engine  works  together  to  drive  the  propeller . The  demonstrator   aircraft    uses  up  to  30%  less  fuel    than  a comparable  plane   with a petrol- only    engine. The  aircraft  is  also  able  to recharge    its  batteries   in  flight  ,the  first  time  it   has  been  achieved During  take  off  and  climb ,  when  maximum power  is required  ,the  engine  and   motor  work together    to  power  the plane.,but  once  cruising height   is   reached , the  electric  motor  can  be  switched   into  generator  mode   to  recharge  the  batteries   or  used  in  motor assist  mode  to  minimize    fuel    consumption Paul  Robertson   of  the    Cambridge     Department  of  engineering  says,until quite  recently   the 

Having a high cholesterol level increases your risk of cardiovascular disease, including heart disease and heart attacks. Making lifestyle changes such as increasing physical activity and losing weight can help lower   your  cholesterol.  Besides you might be able to boost the cholesterol-lowering ability of your diet even more. Research studies indicate certain foods contain natural compounds that can reduce cholesterol, usually by lowering the LDL (the ‘bad’ cholesterol) levels in your blood stream. font-size: x-large;"> But ,please remember these foods aren’t substitutes for cholesterol-lowering medications, and please speak to your health care provider before making any significant dietary changes. Oats Eating a diet rich in whole grains is associated with having healthier cholesterol levels. Oats contain a soluble fiber called beta-glucagon. If you currently have high cholesterol levels, oats can lower cholesterol by as much as 20 percent. O

  What Are Proteins? Proteins are very important molecules in cells. By weight, proteins are collectively the major component of the dry weight of cells. They can be used for a variety of functions from cellular support to cell signaling and cellular locomotion. While proteins have many diverse functions, all are typically constructed from one set of 20 amino acids. Examples of proteins include antibodies, enzymes, and some types of hormones (insulin). Most amino acids have the following structural properties: A carbon (the alpha carbon) bonded to four different groups: A hydrogen atom (H) A Carboxyl group (-COOH) An Amino group (-NH 2 ) A "variable" group Of the 20 amino acids that typically make up proteins, the "variable" group determines the differences among the amino acids. All amino acids have the hydrogen atom, carboxyl group and

1 Apples    Apples are a common favorite. They're the ultimate snack: filling, juicy, crunchy, and portable. Studies have even shown that eating three apples per day can help with weight loss—not surprising, considering they’ re chock-full of fiber, a nutrient that’s known to boost feelings of fullness and ward off hunger pangs. There are plenty of ways to get your daily dose of apple: Chow down on a whole Fuji (apples are such a packable snack!), add pieces to your oatmeal, throw slices into a salad, bake some with your chicken, or cook up a low-cal dessert.  1 medium apple: 95 calories,    . 2 Watermelon    Watermelon is a double whammy: It’s low in calories with a high water content. This means you can eat two entire cups of watermelon for less than 100 calories and your stomach will feel   like you’ve eaten more because the fruit is more than 90 percent water. Staying hydrated h

Our blood is a fluid that is also a type of connective tissue. It is composed of blood cells and an aqueous fluid known as plasma. Two major functions of the blood include transporting substances to and from our cells and providing immunity and protection against infectious agents such as bacteria and viruses. Blood is a component of the cardiovascular system. It is circulated through the body via the heart  and  blood  vessels. Blood Components Blood consists of several elements. The major components of blood include plasma, red blood cells, white blood cells, and platelets.   Plasma: This major constituent of blood comprises about 55 percent of blood volume. It consists of water with several different substances dissolved within. Plasma contains salts, proteins, and blood cells. Plasma also transports nutrients, sugars, fats, hormones, gases, and waste material contained within blood.  Red Blood Cells (erythrocytes): These cells determine blood type and are the