In the 7th grade science classes, students are completing their final lab practicals by dissecting the major anatomical parts of an earthworm, a crayfish, a grasshopper, and a frog!
Students are connecting their cognitive knowledge with their scientific lab skills to culminate the final unit of study. While dissecting the earthworm, students noticed the seminal vesicles and seminal receptacles that enable earthworms to be hermaphroditic. In the crayfish dissection, students identified the cephalothorax, abdomen, and carapace that protect the internal organs of arthropods. During the grasshopper dissection with dorsal side up, students located the tympanum under each wing that is used for sound detection. In the frog dissection with ventral side up, students observed many vital organs such as the heart, lungs, stomach, intestines, liver, and gallbladder.