Question

Choose the correct answer for each of the following.

A The process of taking in air into the body Inspiration Expiration B Double layered membrane that surrounds the human heart Pericardium Myocardium C Red pigment in the blood D The medium of transport in unicellular organisms \( \quad \) Blood \( \quad \) Cytoplasm

Answer 1

• The process of taking in air into the body is called inspiration.
• Pericardium is the double layered membrane that surrounds and protects the heart.
• Haemoglobin is the red pigment present in the blood.
• In unicellular organisms, such as Amoeba, Paramecium, Euglena and Chlamydomonas, there is no need of a separate mechanism to transport substances. The medium of transport is therefore cytoplasm.