Which of the following natural substances contains iron (Fe)?

Which of the following carries oxygenated blood?

Which one of the following is not a part of the male reproductive system in human beings?

Which of the following statements with reference to 'blood' is/are correct? 1. Blood is composed of plasma and different types of cells. 2. The presence of haemoglobin makes blood appear red.

Consider the following elements found in a typical 70 kg man and arrange them in correct increasing order. 1. Sodium 2. Potassium 3. Copper 4. Iron

In humans which chamber of the heart receives oxygen-rich blood from the lungs first?