One teaspoon = approximately 4 grams. A Teaspoon of Sugar provides straightforward, proactive information on sugar metabolism and how too much sugar intake can lead to weight gain, diabetes, heart disease, cancer, learning difficulties, acne, tooth decay and poor athletic performance.
â¢ White blood cells, which fight infections. â¢ Platelets, smaller cells that help blood to clot. Blood is conducted through blood vessels (arteries and veins). Blood is prevented from clotting in the blood vessels by their smoothness, and the finely tuned balance of clotting factors.
Â© 2014 WebMD, LLC. All rights reserved. The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.The heart has four chambers: 1  The right atrium receives blood from the veins and pumps it to the right ventricle.2  The right ventricle receives blood from the right atrium and pumps it to the lungs, where it is loaded with oxygen. 3  The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. 2014 WebMD, LLC. All rights reserved. The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.