Froggy Friends

What is a frog?

Frogs are a kind of small animal belonging to a group called vertebrates (animals with backbones) known as amphibians. This mean that they live part of their life in water and the other part of it on land. They are cold-blooded which means that their body temperature is the same as the surrounding temperature.

Where do frogs live?

Frogs inhabit all the continents of the world and dwell in a wide range of habitats; these habitats should be able to keep their skin moist, which is required for them to live. The majority of them favor regions, such as:

  • Creeks
  • Ponds
  • Swamps
  • Trees
  • Rain forests

How do frogs protect themselves?

Different frog species have different methods of protecting themselves from predators, such as attempting to flee, swelling up or playing dead. Other species use their skin color to either blend in with their surroundings or warn predators that they are toxic.

How do frogs catch insects for their food?

When a frog catches an insect it throws its long tongue out of it's mouth and wraps it around its prey. The frog's tongue then snaps back and throws the food down its throat.

How and why do frogs sing?

When frogs "sing" they are actually trying to attract a mate. Both frogs and toads are capable of croaking but calls vary between each allowing their mates to distinguish who’s who amongst the gathering of species. They can get quite loud and their calls can be heard from miles away.

How do frogs mate?

During mating the males seek out the females and then latch onto the backs of the females in a position called amplexus. This position may be held by the mating frogs as long as several days. The amplexus position stimulates the female to lay her eggs and she does so with the eggs wrapped in a jelly-like substance. Once the female spawns her eggs, the male ejects his semen directly onto the eggs to fertilize them.

Life Cycle of frogs

There are different stages that make up the life cycle of a frogs, which includes:

  • Egg - Tiny frog eggs are laid in masses in the water by a female frog. The eggs hatch into tadpoles.
  • Tadpole - This stage hatches from the egg. The tadpole spends its time swimming in the water, eating and growing. Tadpoles breathe using gills and have a tail.
  • Tadpole with Legs - In this stage the tadpole sprouts legs (and then arms), has a longer body, and has a more distinct head. It still breathes using gills and has a tail.
  • Froglet - In this stage, the almost mature frog breathes with lungs and still has some of its tail.
  • Adult - The adult frog breathes with lungs and has no tail (it has been absorbed by the body).
How are frogs our friends?

Frogs can be critical environmental indicators all around the world. They remain important to our ecosystems.

Frog Dissection

External - Body

Labels and Defintions
  • Head - the upper part of the body
  • Trunk - the mid section of the body
  • Eye - the organs of vision
  • Tympanum - the ear
  • Fore Limbs - the front legs on the body
  • High Limbs - the back legs on the body
  • External Nares - entrance to the respiratory system
  • Mouth - used for eating and vocal purposes

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External - Mouth

  • Internal Nares - either of the two internal nostrils
  • Vomarine Teeth - operate as a team to stop prey animals from being able to flee
  • Gullet - the passage by which food passes from the mouth to the stomach
  • Glottis - opening between the vocal folds
  • Tongue - used for tasting, licking and swallowing
  • Eustachian Tube - equalize pressure in inner ear
  • Maxillary Teeth - teeth in the upper jaw

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Internal - Body

  • Liver - the largest gland of the body
  • Gallbladder - helps digestion
  • Bileduct - the duct that conveys bile from the liver and the gallbladder to the duodenum
  • Duodenum - the first section of the small intestine
  • Messentary - supportive membrane surrounding internal organs and attaching to the body
  • Illeum - the lowest portion of the small intestine
  • Cloaca - a sack that collect discharge from the large intestine, urinary bladder and gonads
  • Stomach - where the digestion begins
  • Pancreas - gland that lies behind the stomach
  • Pylorus - the opening between the stomach and the duodenum.
  • Spleen - part of circulatory system, stores blood
  • Large Intestine - a tube like organ that completes the process of digestion

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