Weegy: There are a lot of different kinds of cells. Different cells can have different purposes, different jobs, different shapes, and different characteristics. [ [ For example, plant cells have a cell wall and animal cells don't. Cells come in different shapes. They can be shaped like snowflakes, balls, cubes, saucers, rectangles, boxes, coils, or blobs of jelly. Animals cells are usually spherical or flat-sided. The amoeba, a one-celled organism that lives in water, has no regular shape. It is a jelly-like cell that changes shape to move around. Some muscle cells are long, thin, and pointed on both sides. Some nerve cells, with their long branches, look like trees. The sizes of cells can be very different. Most cells are 1/1,000 of an inch (0.0025 centimeter) in diameter. Around 500 average sized cells could fit on a period at the end of a sentence. The bacterial cell is one of the smallest of all the cells, and the yolk of a ostrich egg is the biggest of all cells. ] ] User: what is the key hematopoietic cells identifiable within an erythropoietic island of the bone marrow (More)

Weegy: Our bodies get the energy they need from food through metabolism, the chemical reactions in the body's cells that convert the fuel from food into the energy needed to do ... In fact, thousands of metabolic reactions happen at the same time — all ... [ the level of glucose — the body's most important fuel — in the blood......ref....kidshealth.org › Parents › General Health ] (More)