8-3 How do organisms use energy?
Aim: How do organisms use energy?
OBJECTIVE: Name and describe the life processes.
Key Terms
nutrient (NOO-tree-uhnt): chemical substance that is needed to carry out life processes
ingestion (ihn-JEHS-chuhn): process of taking in food
digestion (dih-JEHS-chuhn): process of breaking down food so that it can be used by living things
cellular respiration (res-puh-RAY-shuhn): process by which a cell releases energy from food molecules
byproduct: something produced in addition to the main product
excretion (ehks-KREE-shuhn): process of getting rid of wastes
transport: process of moving nutrients and wastes in a living thing
Lesson Summary
• All organisms carry out life processes.
• Taking in food is called ingestion.
• The process of changing food into usable form is called digestion.
• Organisms get energy from food by a process called cellular respiration.
• Organisms get rid of waste products by a process called excretion.
• The moving of nutrients and waste products is called transport.
OBJECTIVE: Name and describe the life processes.
Key Terms
nutrient (NOO-tree-uhnt): chemical substance that is needed to carry out life processes
ingestion (ihn-JEHS-chuhn): process of taking in food
digestion (dih-JEHS-chuhn): process of breaking down food so that it can be used by living things
cellular respiration (res-puh-RAY-shuhn): process by which a cell releases energy from food molecules
byproduct: something produced in addition to the main product
excretion (ehks-KREE-shuhn): process of getting rid of wastes
transport: process of moving nutrients and wastes in a living thing
Lesson Summary
• All organisms carry out life processes.
• Taking in food is called ingestion.
• The process of changing food into usable form is called digestion.
• Organisms get energy from food by a process called cellular respiration.
• Organisms get rid of waste products by a process called excretion.
• The moving of nutrients and waste products is called transport.