The Frog.

INTEGUMENTARY

The integumentary system of the frog allows it to protect with camouflage, breathe underwater, and stay moist when it is on land. The frog contains a stretchy skin that sometimes changes color to control how much heat to absorb, regulating body temperature. Consisting of an epidermis, dermis, and subcutaneous respiration layer, the frog is suited for any environment. The Epidermis is mostly used for protection. The Dermis contains poison and mucus, used for water and gas exchange The Subcutaneous layer consists of nerves just like the humans.

DIGESTIVE

The digestive system consists of an esophagus, pharynx, stomach, small/large intestine, a rectum, and a cloaca. The frog does not have teeth, therefore creating a slow digestive system. For example, during dissection, we had made an incision into the stomach, and extracted full bug bodies and pieces. The main job of the digestive system is to break down prey to molecules; then absorbed into the body. Saliva, muscle contractions, and enzymes perform a major job for the breakdown of food. Absorbing the nutrients located in the less than 2-3 inch small intestine.

SKELETAL

The frog has an axial skeleton with a spinal cord, skull, and sternum. The frog also has full limb bones and movement, similar to the human and rat. The frog does not have a ribcage; for it would most likely break on impact from jumping. 

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CIRCULATORY

The circulatory contains a heart, veins, blood vessels, and arteries. It has a closed circulatory system with a heart of three chambers. The heart has two auricles, and one ventricle. Disadvantages of a three chambered heart have said to been because of the fact on how oxygenated blood is mixed with blood from the tissues. Compared to a mammal's lungs; where the output-oxygenated blood is separated with non-oxygenated blood. The heart pumps blood to the head, the lungs, the skin, and rest of the body. (Possibly muscular, for muscles need oxygen to function.) 

The Intestine (top) and three chambered heart. (bottom)

MUSCULAR/MOVEMENT

The frog has strong leg muscles for leaping, and excellent abdominals for landing. Frogs most likely generate much power to jump, for they can jump up to 3 feet. Muscle contractions help create this exploding jump. If they may, frogs can walk. It is usually too slow, therefore that energy is much used more efficiently in jumping.