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

Which of the following carries oxygenated blood?

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

The only vein that carries oxygenated blood is :

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.

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): Voices of men and women are different. Reason (R): Length and thickness of vocal cord is d…