Question

(a) What is lymph? State two major functions of lymph.
(b) What is meant by saying that the blood pressure of a person is 120/80?

Answer 1

(a) Lymph is a clear, yellowish, slightly alkaline fluid, containing white blood cells in a liquid that resembles blood plasma.

Functions of lymph:

• It helps in the defensive mechanism of the body by killing the foreign body with the help of lymphocytes and making antibodies.
• It transports nutrients from the tissue cells to the blood, through lymphatic vessels.

(b) A reading of 120/80 means that the person has a normal blood pressure. Here, the systolic pressure is 120 mm Hg and the diastolic pressure is 80 mm Hg.