MS-LS-4.3

3. The framework of bones or other structures that supports and protects an organism's body (e.g., vertebrate spine, insect exoskeleton)
5. The body system responsible for transporting blood or fluids, including nutrients and oxygen, throughout an organism (e.g., the heart and blood vessels in vertebrates)
7. Differences in traits or structures among individuals or species, often due to genetic or environmental factors (e.g., leg length differences)
8. Referring to structures in different species that have similar functions but evolved separately, not from a shared ancestor (e.g., bird wing, insect wing)
9. A specialized structure in an organism made of tissues that performs a specific function (e.g., heart, stomach)
10. The body system that breaks down food into nutrients for energy and growth (e.g., mouth, stomach, intestines)

1. An animal with a backbone or spinal column (e.g., mammals, birds, fish)
2. External body parts like arms, legs, wings or antennae that extend from an organism's main body, oten used for movement or sensing
4. Referring to structures in different species that are similar in form and origin because they come from a common ancestor, even if their functions differ (e.g, human arm, bat wing)
6. An animal without a backbone or internal skeletal system (e.g., insects, crabs)