You lined up all of the red blood cells in your body, they would reach all of the way around the equator, and then some The average life span for a stomach.

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Presentation transcript:

You lined up all of the red blood cells in your body, they would reach all of the way around the equator, and then some The average life span for a stomach cell is two days? A brain cell on the other hand, can live for a lifetime. There are an estimated 1 billion neurons in the human brain The largest and smallest cells in the human body are the gametes, or the sex cells. The female gamete, the oocyte (also known as the egg or the ovum), , which is just visible to the naked eye without the aid of a microscope or other magnification device.. The male gamete, the spermatozoan (also known as the sperm cell), is the smallest cell of the human body. The Ostrich egg is the largest cell on Earth

Cellular Transport

Cell Diversity Shape-reflects the function of the cell

Cell Diversity Size- most are 1/500 the size of a period As the cell grows, volume increases faster than surface area. Why is it important for the cell to remain small? Hint: Think of materials needed & waste produced by the cell

Cell Transport Diffusion Movement of molecules from an area of high concentration to low concentration. Dynamic Equilibrium-when particles are evenly distributed Concentration Gradient-difference in concentration

Cellular Transport Osmosis Water molecules diffuse across a cell membrane Hypotonic-water diffuses into the cell Hypertonic-water diffuses out of the cell Isotonic- remains the same

Osmosis

Hypertonic

Hypotonic

.

https://www.youtube.com/watch?v=9QCxTf0QfTo&feature=related https://www.youtube.com/watch?v=0c8acUE9Itw

Endocytosis

Exocytosis