Which of the following correctly describes a cell, tissue, organ, and organ system? A) osteoblasts, muscle tissue, bone, skeletal system
B blood cells, muscle tissue, bone, muscular system
c) muscle cells, cardiac muscle tissue, esophagus, digestive system
D fat cells, epithelial tissue, sweat gland, integumentary system

Models are non-visual ways of coummincating how someone thinks about something in the natural world

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?

24. how are vaccines used to keep people healthy?