Early African Cities Had a Pattern Based on a Central

question 40

True/False

Early African cities had a pattern based on a central business district surrounded by residential rings determined by income.

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Definitions:

Serum

The component of blood that remains after clotting has removed the blood cells and clotting proteins, containing antibodies and other proteins.

Formed Elements

Cells (i.e., red and white blood cells) and cell fragments (i.e., platelets) of blood.

Leukocytes

White blood cells that are part of the body's immune system, involved in protecting the body against both infectious disease and foreign invaders.

Erythrocytes

Red blood cells, which are responsible for carrying oxygen from the lungs to all parts of the body and returning carbon dioxide to the lungs for expulsion.