1. Cell Diversity – trillions of cells in the human body are made up of some 200 different cell types that vary greatly in size, shape and function.
1. Cells that connect body parts:
a.Erythrocyte (RBC) – concave disk that
carries oxygen and flows easily through
the bloodstream.(Cardiovascular System)

2. 2. Cells that cover and line body organs:
a.Epithelial – hexagonal in shape which
allows the cells to be packed together.
(Integumentary System)
3. Cells that move organs and body parts:
a. Skeletal Muscle – elongated and
contain many contractile filaments so
muscles can contract.(Muscular)
b. Smooth Muscle – elongated and a
few contractile filaments.(Digestive)

3. 4. Cells that store nutrients:
Fat Cell -spherical in shape with the
nucleus pushed to the side. (Found
in breast tissue and surrounding
organs for protection.)
5. Cells that fight disease:
Macrophage – contains pseudopods
which allows the cell to crawl around
to locate infection so that lysosomes
can ingest it. (Lymphatic System)

4. 6. Cells that control body functions:
Neuron- has long processes to
receive and transmit messages.
(Nervous System)
7. Cells of Reproduction:
Oocyte- female egg cell, largest cell
in the body.
Sperm – male cell, long and built for
swimming. Contains a flagellum to
propel the sperm. (Reproductive)