Which of the following is a primary function of the lymphatic system?

A. It allows for longitudinal bone growth: The epiphyseal plate, or growth plate, is a layer of hyaline cartilage located between the epiphysis and diaphysis. It enables bones to lengthen during childhood and adolescence through the process of endochondral ossification.

B. It acts as a site for red blood cell production: Red blood cell production occurs primarily in the bone marrow, not in the epiphyseal plate. The growth plate is involved in bone elongation rather than hematopoiesis.

C. It stores calcium for bone strength: Calcium storage occurs in the bone matrix, particularly in compact and spongy bone tissue, not within the epiphyseal plate itself.

D. It provides a surface for muscle attachment: Muscle attachment occurs on bony landmarks such as tuberosities, processes, and ridges. The epiphyseal plate’s function is related to bone growth, not serving as a site for muscle attachment.

A. By absorbing excess interstitial fluid and returning it to the blood: The lymphatic system collects fluid that leaks from capillaries into tissues, known as interstitial fluid, and transports it back to the circulatory system, preventing edema and maintaining fluid balance.

B. By controlling the osmotic pressure in blood vessels: Osmotic pressure is primarily regulated by plasma proteins and electrolytes, not directly by the lymphatic system.

C. By producing hormones that regulate fluid secretion: Hormonal regulation of fluid balance involves organs like the kidneys and adrenal glands, not the lymphatic system.

D. By filtering toxins from the bloodstream: Lymph nodes filter lymph to remove pathogens and debris, which supports immunity but does not directly regulate fluid balance.