Which of the following statements is/are true? The normal blood volume in adults is 5 to 6 liter, it accounts for 7-8% body weight. Blood transports nutrients, hormones, and nitrogenous waste. Human blood is slightly alkaline in nature.

Which of the following statements is/are true? The normal blood volume in adults is 5 to 6 liter, it accounts for 7-8% body weight. Blood transports nutrients, hormones, and nitrogenous waste. Human blood is slightly alkaline in nature. Correct Answer 1, 2 and 3

The correct answer is 1, 2 and 3.

 Important Points

• Blood Structure -
  • Plasma, red blood particles (RBCs), white blood cells (WBCs), and platelets (oocytes) are found in the blood.
  • About 50–60 percent of the blood is plasma.
  • Generally, it contains 90 percent water and 10 percent inorganic and organic materials.
  • Blood plasma is alkaline in nature due to inorganic alkaline salts.
• Blood functions -
  • Blood transports substances such as respiratory gases, waste materials, enzymes, etc, from one part of the body to another.
  • It protects against diseases and to controls the body temperature.
  • The blood takes hormones from the endocrine glands and carries them to different parts of the body.
  • The blood takes the waste product urea from the liver and carries it to the kidneys for excretion.
  • On average, a healthy man has about 5-6 liters of blood in his body.
  • Whereas women have about 500 ml less blood than men.