Question:

The triangular sac like structure which receives blood through the vena cava in frog is

Updated On: Aug 1, 2022
  • ventricle
  • sinus venosus
  • hepatic portal system
  • conus arteriosus
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is B

Solution and Explanation

Frog?? heart is a 3-chambered structure, made of two anterior dark coloured artria or auricles (right and left), and a single posterior conical and pink coloured ventricle. The heart of frog has two additional chambers: sinus venosus and truncus arteriosus. Sinus venosus is a dark coloured, thin walled and triangular chamber attached dorsally to heart. It is formed by the union of three large caval veins, two anterior precavals and one posterior postcaval. Deoxygenated blood from the body travels towards heart in three large vessels, two anterior venae cavae and single posterior vena cava, all the three opening into sinus venosus. When sinus venosus contracts, its deoxygenated venous blood is forced into the right auricle through sinuauricular aperture.
Was this answer helpful?
0
0

Concepts Used:

Frogs

A frog is any member of a miscellaneous and largely carnivorous group of short-bodied, tailless amphibians constituting the order Anura. Frogs are extensively distributed, ranging from the tropics to subarctic regions, but the significant concentration of species diversity is in tropical rainforests. Frogs account for around 88% of enduring amphibian species. They are also one of the five most varied vertebrate orders. Warty frog species tend to be termed toads, but the divergence between frogs and toads is informal, not from taxonomy or evolutionary history.

An adult frog has a stout (fat and round) body, protruding eyes, limbs folded underneath, anteriorly-attached tongue, and no tail. Frogs have glandular skin, with secretions aligning from distasteful to toxic. Their skin differs in color from well-camouflaged dappled (dots and spots) brown, grey and green to lifelike patterns of bright red or yellow and black to show toxicity and ward off predators. Adult frogs live in fresh water and on dry land and some species are adapted for living underground or in trees.

Read More: Metamorphosis: Life-Cycle of Frogs