Chapter 34, Problem 9A

Summary Introduction

Introduction:

The circulatory system includes of the heart, blood vessels and blood. The blood transports oxygen and nutrients or mineral to each cell with inside the body and picks up waste products (like carbon dioxide) for removal from the body. The bulk of our blood is composed of plasma. Floating inside the plasma are the red blood cells that transport oxygen, the white cells that develop part of the immune system, and clotting cells called platelets.

Answer to Problem 9A

Correct answer:

The correct answer is option D. white blood cells.

Explanation of Solution

Explanation/justification for the correct answer:

Option D. white blood cells. The major function of white blood cells, or leukocytes, is to combat infection. There are numerous sorts of white blood cells and each has its own part in fighting bacterial, viral, fungal, and parasitic infections. So, the correct answer is option C.

Explanation for incorrect answer:

Option A. plasma. The major function of plasma is to transport nutrients, hormones, and proteins to the parts of the body that need it. Cells additionally place their waste products into the plasma. So, this is an incorrect answer.

Option B. platelets. Platelets are small, colorless cell fragments in our blood that produces clots and stop bleeding. So, this is an incorrect answer.

Option D. red blood cells. The major role of RBCs is to transport oxygen from the lungs to the tissues, in which it is used as a supply of electrons and ATP synthesis in the mitochondria. So, this is an incorrect answer.