Question

Which of the following is NOT an organ system?

skeletal
blood
nervous
urinary

Answer 1

Blood is not a organ system

Answer 2

Blood

Step-by-step explanation:

The 11 organ systems include the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal system, muscular system, endocrine system, lymphatic system, nervous system, and reproductive systems.