DAY 2: the immune and skeletal system + levels of organization

2. are proteins produced by white blood cells and form part of a specific immune response to foreign materials.
4. contain small amounts of weekend or dead pathogens that stimulate an immune response.
7. a living things.
8. bone functions forms the hard layer covering the outside layer of bone and is known as the basic supportive tissue of the body.
13. the bones of this skeleton function mainly to allow movement.
16. is a chemical marker on a cell's surface that indicated whether the cell is from your body or is a foreign material.
18. is a group of organs that together perform a function that helps the body meet its needs for energy and materials.
20. a substance that an organism needs to live.
21. is known as the major ingredient in bone.
22. fluid that is transported by the lymphatic system.

1. resistance to a sickness.
3. strong but light weight bone, this forms the inner layer of bone.
5. is the part of the skeleton that forms the axis and provides support and protection.
6. functions to defend the body against foreign materials.
8. hairlike protrusions that trap materials entering your respiratory system.
9. the ability of your body to maintain internal conditions.
10. what is an advantage of having many bones in the spinal column?
11. is a group of similar cells that work together to perform a particular function.
12. disease-causing agents.
14. what is the bodies first defense reaction against infection?
15. hold bones together.
17. are medicines that block the growth and reproduction of bacteria.
18. is a structure that is made up of two or more types of tissue that work together to carry out a function in the body.
19. system this system serves as an anchor for all of the body's movement,provides support, and protects soft organs inside the body.
21. is the basic unit of life.