Question

FROG LAB DISSECTION (1 short simple sentence each)

QUESTIONS
IDENTIFY RELATIONSHIPS what do you think the function of the nictitating membrane? Why?
ANALYZING DATA A frog does not chew its food. What do the position of its teeth suggest about how the frog uses them
ORAGINING DATA through which structure does food pass as it moves through the frog's digestive tract?
ORGANIZING DATA list the structures in order through which sperm pass in a male and eggs pass in a female
ORGANIZING DATA through which structure does urine pass in a frog
EXAMINING DATA which parts of the frog's nervous system can be observed in its abdominal cavity and hind legs
MAKING INFERENCES the abdominal cavity of a frog at the end of the hibernation season would contain very small fat bodies or none at all. What is the function of the fat bodies
ANALYZING DATA what features did you notice in the frog that have helped it adapt to living on land
EXPLAINING EVENTS why did you dissect the nerves last

CONCLUSION
MAKING PREDICTIONS structures of an animal's body that help is survive in its environment are adaptations how do the frogs powerful hind legs help it survive in both water and on land
APPLYING CONCLUSIONS suppose in a living frog the spinal nerve extending to the leg muscle was cut what ability would the frog lose and why
DRAWING CONCLUSIONS think about the skin of the frog you dissected a frog can respire through its skin but a fish can't why do you think this is so

Answer 1

### FROG LAB DISSECTION

**IDENTIFY RELATIONSHIPS:** The nictitating membrane protects the frog's eye while allowing it to see, similar to a windshield wiper.

**ANALYZING DATA:** The position of the frog's teeth suggests they are designed for gripping prey rather than chewing.

**ORGANIZING DATA:** Food passes through the mouth, esophagus, stomach, and intestines in a frog's digestive tract.

**ORGANIZING DATA:** In a male frog, sperm passes through the testis, vas deferens, and cloaca; in a female frog, eggs pass through the ovary, oviduct, and cloaca.

**ORGANIZING DATA:** Urine passes through the kidneys to the cloaca in a frog.

**EXAMINING DATA:** The spinal cord and peripheral nerves can be observed in a frog's abdominal cavity and hind legs.

**MAKING INFERENCES:** The fat bodies store energy for the frog during hibernation and times of food scarcity.

**ANALYZING DATA:** The frog’s webbed feet, smooth skin, and strong limbs help it adapt to living on land.

**EXPLAINING EVENTS:** Nerves were dissected last to avoid damaging other structures and to observe their connections comprehensively.

### CONCLUSION

**MAKING PREDICTIONS:** Frogs' powerful hind legs allow them to jump efficiently in water and on land, aiding in escape and locomotion.

**APPLYING CONCLUSIONS:** If the spinal nerve to the leg muscle were cut, the frog would lose the ability to move that leg due to lack of nerve signals.

**DRAWING CONCLUSIONS:** Frogs can respire through their skin due to their semi-permeable skin structure, which is not present in fish.