sentence2_structure: the muscular and skeletal organs<>are known as<>the musculoskeletal system
sentence1: Includes the levels of organization (biochemistry, cells, cellular metabolism, and tissues), and support and movement (integumentary system, skeletal system, and the muscular system).
sentence2: Together, the muscular and skeletal organs are known as the musculoskeletal system.
question: Together, the muscular and skeletal organs are known as what?