Question

Select the correct option:

Fill up the blanks in the following paragraph by selecting the correct option.
The vascular system of frog is well-developed ______ (i) type. The blood vascular system involves heart, blood vessels and blood. Heart has 3 chambers, two atria and one ventricle and is covered by a membrane called ______ (ii). A triangular structure called ______ (iii) joins the right attrium.

• A. (i)- open; (ii)- conus arteriosus; (iii)- neurilemma
• B. (i)- closed; (ii)- sinus venosus; (iii)- pericardium
• C. (i)- open; (ii)- neurilemma; (iii)- conus arteriosus
• D. (i)- closed ; (ii)- pericardium; (iii)- sinus venosus

Answer 1

The correct option is D (i)- closed ; (ii)- pericardium; (iii)- sinus venosus

The vascular system of frog is well-developed (i) 'closed' type. The blood vascular system involves the heart, blood vessels and blood. The heart has 3 chambers, two atria and one ventricle and is covered by a membrane called (ii) 'pericardium'. A triangular structure called (iii) 'sinus venosus' joins the right atrium.

So, the correct answer is '(i)- closed ; (ii)- pericardium; (iii)- sinus venosus'.