These animals do not have a bony skeleton. All insects are invertebrates. They do have a skeleton but it is on the outside of their bodies and is not made of bone. These two main groups have been divided into smaller groups.
There isn't an exact 'normal' figure for the number of cells in your blood (called your blood count). 'Normal' for a large man wouldn't be the same as for a small woman. But generally the normal white cell count is between about 4,000 and 11,000 cells per cubic millimetre of blood.here isn't an exact 'normal' figure for the number of cells in your blood (called your blood count). 'Normal' for a large man wouldn't be the same as for a small woman. But generally the normal white cell count is between about 4,000 and 11,000 cells per cubic millimetre of blood.
White blood cells circulate throughout the body, ready to fight infections. They live about two or three weeks, when they are broken down and recycled by the body. A normal white blood cell count is between about 4,500 and 10,000 cells per microliter. Many conditions can cause a low white blood cell count: â¢ Infection (which usually increases the white blood cell count, but may decrease it). â¢ Drugs, especially chemotherapy. â¢ Human immunodeficiency virus (HIV). â¢ Severe alcohol abuse.