tudents to observe structures such as the skin, muscles, skeletal system, circulatory system, digestive system, reproductive organs, and nervous system firsthand. The objective of the dissection lab is to identify, examin
h. Esophagus: A short tube leading to the stomach. Stomach: A J-shaped organ where chemical digestion begins; often distinguished by rugae (folds). Liver: A large, lobed organ that secretes bile and aids in digestion. The liver is usually fatty and may be dissected
or gas exchange. Cons: Water flow must be continuous; sharks cannot breathe while stationary unless they actively swim. Circulatory System Question: Describe the circulatory system of the dogfish shark. Answer: The shark has a closed circulatory sy
tudents to consider questions like: What are the distinguishing external features of the dogfish? How does the anatomy compare to other fish or vertebrates studied? What adaptations might these features indicate about the dogfish's ecology
erch, with some species reaching up to 4 feet. Perch: Have a more laterally compressed, stocky body shape suitable for maneuvering in freshwater environments. Their size varies widely but generally remains smaller than dogfish. Fins and
es suggest that the arrangement of myotomes in sharks shares similarities with that of other fish groups, indicating a conserved evolutionary pattern. Comparative Perspectives: Dogfish Sharks and Other Vertebrates Understanding the arrangement of myotomes
