Cells

1. Cells The Building Blocks of Life

2. Cells • Cells are the smallest unit of living matter. • All living things including plants and animals are made up of cells. • There are many different types of cells and each cell has a specific job. http://www.cellsalive.com/cells/cell_model.htm

3. Red Blood Cells • Red blood cells carry oxygen to all cells in your body. • Red blood cells also carry away carbon dioxide, a waste gas.

4. Red Blood Cells • This shape allow them to absorb oxygen and carbon dioxide and easily move through small spaces.

5. Nerve Cells • Nerve cells carry messages throughout your body. • Some nerve cells obtain information about sight, smell, hear, feel, and taste. • Some nerve cells help to speak. • Other nerve cells help you to respond to hot and cold.

6. Nerve Cells

7. Muscle Cells • Muscle Cells move different body parts. • Muscle cells are bundled together to form strong fibers. In the bundle muscles have greater strength for movement. • There are 3 types of muscle cells: • Skeletal muscle • Cardiac muscle • Smooth muscle

8. Skeletal Muscle • Skeletal muscles move your head, arms, legs, fingers, and toes. • Skeletal muscles work in pairs to move bones back and forth. • Skeletal muscles are voluntary muscles meaning you can control their movement.

9. Skeletal Muscle http://health.howstuffworks.com/human-body/systems/musculoskeletal/adam-200006.htm

10. Smooth Muscles • Smooth muscles are found in the walls of organs such as the stomach, intestines, and bladder. • Smooth muscles are involuntary muscles meaning you can not control their movements.

11. Cardiac Muscle • Cardiac Muscle make up the walls of the heart. • Cardiac muscle squeezes and relaxes without stopping. • Cardiac muscle are involuntary meaning you can not control their movement.