Final answer:
Blood is considered a connective tissue because it has a matrix and consists of red and white blood cells.
Step-by-step explanation:
True. Blood is considered a connective tissue because it has a matrix, as shown in Figure 24.17. The living cell types are red blood cells (RBC), also called erythrocytes, and white blood cells (WBC), also called leukocytes. The fluid portion of whole blood, its matrix, is commonly called plasma.