Question
Which statement about the composition of blood is most accurate? Blood contains erythrocytes, white blood cells, platelets and plasma. Blood contains erythrocytes, white blood cells and platelets. Blood contains erythrocytes , phagocytes, platelets and plasma. Blood contains erythrocytes , phagocytes , lymphocytes , platelets and plasma.
Answer
4.6
(256 Votes)
Eleanor
Professional · Tutor for 6 years
Answer
"Blood contains erythrocytes, phagocytes, lymphocytes, platelets and plasma."
Explanation
## Step 1: We need to identify the most accurate statement about the composition of blood. Blood is a complex bodily fluid that has multiple components. These components can be broadly categorized into four main types: 1. Plasma: This is the liquid component of blood and serves as the medium in which various blood cells and other substances are suspended. It is mostly water but also contains electrolytes, hormones, and waste products. 2. Erythrocytes: Also known as red blood cells, erythrocytes are responsible for carrying oxygen from the lungs to the tissues and organs throughout the body. They contain hemoglobin, a protein that binds to oxygen. 3. Leukocytes: These are the white blood cells, which play a crucial role in the immune system. They help fight off infections and other diseases. 4. Thrombocytes: Also known as platelets, these are small, disc-shaped cells that are essential for blood clotting. They adhere to the walls of damaged blood vessels and release chemicals that help form clots to prevent excessive bleeding. ## Step 2:Now, let's evaluate each statement:1. "Blood contains enythrocytes, white blood cells, platelets and plasma." - This statement is incorrect because it mentions "enythrocytes" which is a misspelling. The correct term is "erythrocytes".2. "Blood contains enythrocytes, white blood cells and platelets." - This statement is also incorrect due to the misspelling of "erythrocytes".3. "Blood contains erythrocytes, phagocytes, platelets and plasma." - This statement is partially correct. Phagocytes are a type of white blood cell, but the term "white blood cells" encompasses more than just phagocytes.4. "Blood contains erythrocytes, phagocytes, lymphocytes, platelets and plasma." - This statement is the most accurate. It correctly identifies erythrocytes (red blood cells), two types of white blood cells (phagocytes and lymphocytes), platelets, and plasma as components of blood.