Transportation: The Circulatory System - 2

Lacteals are the lymphatic vessels arising in the intestinal villi.

Aplastic anaemia is a disease in which the bone marrow and the blood stem cells that reside there are damaged.
Polycythemia is a disease in which the proportion of blood volume that is occupied by red blood cells increases.
Thalassemia is a genetic disease that results in the production of an abnormal ratio of hemoglobin subunits.

The Cords of Billroth (also known as splenic cords or red pulp cords) are found in the red pulp of the spleen between the sinusoids.

This is correct. It possesses lymphocytes. It protects the body from various diseases. It equalises the body temperature.

Oxygen-rich blood from the lungs comes to the thin-walled upper chamber of the heart on the left, i.e. the left atrium. The left atrium relaxes when it collects the blood.

Valves ensure that the blood does not flow backwards when the atria or ventricles contract.

This is the correct option. The chambers of the heart are separated by a partition called septum.

Mismatching of Rh factor causes Erythroblastosis foetalis or Hemolytic Disease of the Newborn (HDN). This fetal disease ranges from mild to very severe, and fetal death from heart failure (hydrops fetalis) can occur. Mismatching of Rh factor causes Erythroblastosis foetalis or Hemolytic Disease of the Newborn (HDN).

Platelets help in the clotting of the blood. Thus, preventing the excessive loss of blood during an injury.

WBCs help protect the body from infection and kill harmful microbes. Platelets help in clotting the blood, so as to prevent the body from excess loss of blood during an injury.