Human Biology Bellringer • What is the basic unit of structure and function in a living thing? • Organize the following from smallest to largest: $1, 50¢, $5,000, and 1¢ • Why do the cells in the following pictures look different? Specialized Cells Perform Specific Jobs! • Red blood cells: Bring oxygen, carbon dioxide and nutrients around the body • Nerve cells: Send messages around the body • Digestive cells: absorb nutrients from food • Lung cells: Get oxygen in and carbon dioxide out • Bone cells: supports body and protects organs • Reproductive cells: produce offspring • Muscle cells: move the body • Cells combine to form tissue. Tissue is a • There are 4 kinds of tissue: – Connective Tissue • 2 Types of Muscle: • Involuntary muscles are and -Example: digestive muscles • Voluntary muscle are -Example: biceps and triceps • Skeletal muscles help move bones and work in and Tissues carries messages back and forth from the and the body covers your body and protects tissue underneath it – Example: • Organs are all of the different parts of our body composed of different kinds of ! • Organs work together to accomplish jobs and create body systems • Organ systems are groups of organs that do certain jobs in our body Digestive System!