Which of the following describes how two human body systems work together to maintain homeostasis? The nervous system transports oxygen to the respiratory system causing the breathing rate to change.

The circulatory system moves nutrients throughout the body to be broken down in the digestive system.

The circulatory system brings oxygen into the body and the excretory system gets rid of the carbon dioxide.

The nervous system sends signals through the nerves causing the muscles in the musculoskeletal system to contract.

80 points pls brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?