Final answer:
The correct order of tissue layers, beginning with the innermost layer, is peritoneum, muscle, fascia, subcutaneous, and skin, which corresponds to option D.
Step-by-step explanation:
The correct order of tissue beginning with the innermost layer is D) Peritoneum, muscle, fascia, subcutaneous, skin. To clarify the layers starting from the innermost to the outermost: the peritoneum is the innermost layer that lines the abdominal cavity; the muscle layer which includes the skeletal muscles; the fascia, which is a layer of fibrous tissue that surrounds muscles; the subcutaneous layer also known as the hypodermis that consists mainly of fat cells; and finally, the skin, which is the outermost protective layer of our body.
The peritoneum is also known as the serosa in the alimentary canal, which is indeed the outermost layer of the GI tract organs according to figure 23.4. It should not be confused with being the innermost layer when considering the entire body's structure. Furthermore, the skin is a complex tissue composed of multiple layers itself, including the epidermis and dermis, as stated in the provided information. The hypodermis, or subcutaneous tissue, lies directly beneath the skin's dermis.