Objective: • Describe the characteristics of living things • Provide a basic description of cells The Characteristics of Life The Characteristics of Life Living things: 1. 2. 3. 4. 5. 6. 7. can reproduce grow and develop respond to the outside world need to use energy change as their environments change can move are very highly organized (called organisms) 8. are made of cells What is a cell? Cells – The basic units of life. The simplest living structures that can carry out all the activities characteristic of life. Cells Working Together: Tissues and Organs Cells Working Together 1. Layers of cells that are similar in structure and function are called tissues 2. 3. Different types of tissues can group together to form organs Certain organs combine to form organ systems Cells Working Together Cells Less Complex Tissues Organs Systems More Complex Human Organ Systems 1. 2. 3. 4. 5. 6. 7. 8. 9. Skeletal Muscular Nervous Circulatory Excretory Digestive Endocrine Respiratory Reproductive Video Quiz Please write a summary of the notes. Complete the Worksheet (Hand Out): “Understanding Cells –Lesson 1: Life and Cells”