Common Feature in Frogs and Rabbits: Hepatic Portal System

The hepatic portal system is a network of veins that carries blood from the digestive organs to the liver. It is found in both frogs and rabbits.

Frogs and rabbits are both vertebrates and belong to the class Amphibia and Mammalia respectively. Although they belong to different classes, they share some common features.

The hepatic portal system is an important feature that is found in both frogs and rabbits. This system is responsible for carrying nutrient-rich blood from the digestive organs to the liver, where it is processed before being distributed to the rest of the body.

Other features that are unique to each class include:

- Renal portal system: This is a feature that is unique to amphibians such as frogs. It is a network of veins that carries blood from the hindlimbs and pelvic region to the kidneys for filtration.
- Jugular anastomosis: This is a feature that is unique to mammals such as rabbits. It is a network of veins that connects the two jugular veins, which are the major veins that carry deoxygenated blood back to the heart.
- Anterior abdominal vein: This is a feature that is unique to frogs. It is a large vein that runs along the ventral (belly) side of the body and carries blood from the lower part of the body to the heart.

In summary, while frogs and rabbits share some common features, they also have some unique features that distinguish them from each other. The hepatic portal system is a feature that is found in both frogs and rabbits and plays an important role in nutrient processing and distribution.

The renal portal system is absent in the rabbit. The hepatic portal system is present in rabbit and it consists of a hepatic portal vein ventral to the post caval vein. It enters into the liver, divides into a number of branches to supply to various lobes of the liver.

In the rabbit, the blood from different organs of the body is collected by two superior vena cavae and a posterior vena cava which open separately into the right auricle.

In Frog, the blood from different organs of the body is collected by two precavals and one post caval which unite together to form a sinus venosus that in turn opens into the right auricle.