Select your answer:
Topics:
Integumentary and Musculoskeletal System Microbiology Parts of the Body 5 Major Food Groups Excretory System Types of Reproduction Linked Gene Heart Structure and Double Circulation Integumentary System & Body Directions Transportation and Excretion Body Systems and Medical Sciences Diabetes Bone Inheritance Pathology InflammationOther quiz:
Organization of Systems › ViewThe body system that circulates blood and delivers materials throughout the body.
A. digestive system
B. circulatory system
C. excretory system
D. nervous system
Biotechnology › View
What is the role of the spleen in the immune response?
A. It filters blood and activates lymphocytes.
B. It produces red blood cells.
C. It stores iron and vitamins.
D. It regulates body temperature.