| (a) | Congestion of lungs is one of the main symptoms of heart failure. |
| (b) | Each vein has an inner lining of cuboidal endothelium, called tunica intima. |
| (c) | The cardiac output of an athlete will be much lower than that of an ordinary man. |
| (a) | The systemic circulation provides nutrients, CO2, and other essential substances to the tissues and takes O2 and other harmful substances away for elimination. |
| (b) | Heart of both humans and cockroach is myogenic. |
| (c) | Intestinal juice along with pancreatic juice is known as succus entericus. |
| (d) | The SAN can generate the maximum number of action potentials, i.e., 70-75 min–1 |
| Statement A: | Though the human heart is autoexcitable, its functions can be moderated by both neural and hormonal mechanisms. |
| Statement B: | Lymph is almost similar to blood except for the protein content and the formed elements. |
| Column-I | Column-II | ||
| a. | Atherosclerosis | (i) | Liver is affected |
| b. | Angina | (ii) | Feeling of nausea |
| c. | Jaundice | (iii) | Acute chest pain |
| d. | Vomiting | (iv) | Deposition of calcium, cholesterol, etc in arteries |
| (a) | The volume of blood pumped out by the right and left ventricles is the same during each cardiac cycle. |
| (b) | A person whose blood group is O has both A and B antigens on his/her RBCs. |
| (c) | Blood normally contains 15,000-35,000 platelets mm-3 of blood. |
| Column I | Column II | ||
| (i) | A | (a) | Anti-B |
| (ii) | AB | (b) | Anti-A |
| (iii) | O | (c) | Nil |
| (iv) | B | (d) | Anti-A, B |