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.
Venous, Arterial, and Capillary Blood Specimens. Venous Blood. Venous blood is deoxygenated blood that flows from tiny capillary blood vessels within the tissues into progressively larger veins to the right side of the heart. Venous blood is the specimen of choice for most routine laboratory tests. The blood is obtained by direct puncture to a vein, most often located in the antecubital area of the arm or the back (top) of the hand.