 How is the human body organized?

 Cells  Tissues  Organs  Organ Systems  Organisms

 The smallest unit of structure and function in all living things  Within an individual, many different kinds but all (aside from reproductive cells) have the SAME DNA  same set of instructions

 Groups of cells working together to perform a specific task ex: muscle tissue

 Groups of tissues working together lung, heart, brain

 Organs working together to perform a specific task or tasks respiratory system includes lungs, blood, heart digestive system includes stomach, intestine, etc.  All of these systems work together in an organism

What different types of chemicals help your body function?

 Carbohydrates  Lipids  Proteins  Nucleic Acids

 SUGARS!!! body’s immediate source of energy broken down in cellular respiration (will get there next week! generally comes in form of glucose or starch

 have many specialized jobs throughout the body hemoglobin carries oxygen in blood amylase breaks starch into simple sugars for digestion  shape of protein determines its function if shape changes, protein can no longer work  ENZYMES specific proteins that help chemical reactions along in your body

 lipids fats usually don’t like water  think about wax/oil with water  nucleic acids make up your DNA store genetic information mistakes in nucleic acids in your body can lead to many diseases  ex- Tay-Sachs, Sickle-cell anemia, some cancers

 What are some ways that a protein can be made to not work?  What is your body’s advantage in doing this?  How can this hurt your body?