Question

what is the function of red blood cells in the circulatory system?
a. to carry oxygen to tissues
b. to fight infections
which component of blood helps to regulate body temperature?
a. white blood cells
b. plasma

Explanation:

First Question:

Red blood cells (erythrocytes) contain hemoglobin, which binds to oxygen in the lungs and transports it to body tissues. White blood cells fight infections, so option a is correct.

Plasma is the liquid component of blood. It helps regulate body temperature by distributing heat throughout the body. White blood cells are for fighting infections, so option b is correct.

Answer:

a. To carry oxygen to tissues

Second Question: