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Nervous System Functioning Nutrition in Humans and Animals Muscle pathophysiology Immune Response Soldiers of Defense Doctor Equipments Human Organ System Pathology Introduction Cell Injury Disease and Immunity Food for Thought Muscoskeletal System Bacterial Protein Synthesis Inhbitors Muscle Anatomy The Cardiovascular System OCR A-level Diseases Key TermsOther quiz:
Movement and Locomotion › Viewwhen the circular muscle contract, the longitudinal muscle relax, the earthworm become
A. shorter and thinner
B. shorter and thicker
C. longer and thinner
D. longer and thicker
The Vascular System and Blood Flow › View
What is the function of the skeletal muscle pump in the return of blood to the heart?
A. Increasing the delivery of blood to the working muscle
B. Regulating blood clotting
C. Pushing or massaging blood back to the heart with each muscle contraction
D. Assisting in the distribution of blood to different organs