The smallest unit capable of life!

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Presentation transcript:

The smallest unit capable of life! CELLS The smallest unit capable of life!

Types of Living Things Single-celled: simple; uni-cellular; bacteria; some protists (amoeba) Multi-cellular: contain SPECIALIZED cells; some protists, animals, plants, fungi

How Living Things Are Organized

SPECIALIZATION Different types of cells form during your development and perform different jobs Differ in shape, size, function, and life span Adult humans have over 200 types of cells a.k.a. Differentiation

carry "messages" through the body 1 nerve cells or neurons carry "messages" through the body

2 & 3 red blood cells carry oxygen from lungs to other body cells white blood cells defend body from disease

lengthen and contract to allow for movement 4 muscle cells lengthen and contract to allow for movement

shield the internal body from germs; control water loss 5 skin cells shield the internal body from germs; control water loss

form the skeleton and support the body 6 bone cells form the skeleton and support the body

Major Systems of the Human Body

Comparing Organ Systems Stomach Capillaries Heart Intestines Bronchi Esophagus Bones Blood Trachea Teeth and saliva Arteries Muscles Ligaments Veins Lungs Cartilage

defend body from disease nerve cells or neurons defend body from disease carry oxygen from lungs to other body cells muscle cells shield the internal body from germs; control water loss white blood cells lengthen and contract to allow for movement

carry "messages" through the body red blood cells carry "messages" through the body skin cells bone cells form the skeleton and support the body