Which Pair Of Feet Is Webbed?

Purpose: The purpose of this lab was to observe the external and internal anatomy of a frog and identify the anatomical structures in order to further understand and compare it to the anatomy of the human body.

Describe the digits on each foot. Which pair of feet is webbed? Why? How can you tell the difference between a male and female frog by looking at the forelimbs?
The front feet of the frog are webbed which allows it to swim easier and quicker. Webbed feet are a fusion of two or more of the digits of the feet. Frogs have two front legs with four toes and two back legs with five toes.

How are the positions of the eyes and external nostril appropriate for life in water?
The eyes are covered by a clear membrane. This helps amphibians
How do the large numbers of eggs and sperm produced relate to the frog’s fitness for life? A male frog’s testes are attached to its kidneys. This is where the sperm travels to the uterus. Sperm is released through the cloaca onto the female’s eggs. The female’s ovaries are directly beside the kidneys. The eggs are passed down through the two oviducts and out the cloaca. Fitness is the genetic contribution of an individual to the next generation. This is measured by the number of offspring that survive to reproductive age. Frogs that have larger numbers of eggs and sperm have higher rates of reproduction. The eggs and sperm are released in water and have a high chance of being eaten by predators. Therefore, the larger number of eggs and sperm released increase the frog’s fitness for life.

What is the function of the fat bodies in the frog. The role of fat bodies is to add insulation to the frog’s organs. This is especially important for reproductive organs. Fat bodies are needed during hibernation, metamorphosis and mating. The fat bodies function to store
In water, the hind legs allow the frog to swim quickly to get food and away from predators. On water, the hind legs help the frog to jump over obstacles and hunt for prey. A second adaptation is that frogs can breathe through their skin or with their lungs. On land it is easier for a frog to breathe through their lungs and with their skin simultaneously. In the water they breathe through their skin and have nasal valves that prevent water from getting into their lungs. Third, frog’s skin is covered with mucus to keep it moist when on land. When the frog is in water it does not need to worry about drying out. On land the mucus keeps it from drying out. Frog's skin is replaced weekly by pulling off old skin in order to ensure efficient coating of