noun. 1  1A line or set of lines enclosing or indicating the shape of an object in a sketch or diagram. âthe chalked outline of a human bodyâ. 2  2A general description or plan showing the essential features of something but not the detail. âan outline of parliamentary procedureâ.
Erythrocytes, or red blood cells, are the most abundant of the  formed elements of the blood.The other formed elements are  leukocytes (white blood cells) and thrombocytes â¦ (platelets). erythrocytes (red blood cells) Erythrocytes (red blood cells or RBCs) platelets, for about 250,000-500,000 per mm3 of blood.rythrocytes, or red blood cells, are the most abundant of the  formed elements of the blood.
There are 4 very abundant elements found in living systems. These 4 abundant elements are oxygen, carbon, hydrogen, and nitrogen.