★ Blood Groups Quiz
Which of the following does NOT describe the veins?
A. Thin walls
B. Thick walls
C. Large lumen
D. Presence of valves
Select your answer:
Topics:
CV System A&P & Pathology Digestion and Microbes Blood clotting Disease Outbreak and Transmission Selective Breeding Ears Infectious Disease Disease, Illness and Sickness Biotechnology: Tools & Techniques Type of Dementia Living Organisms & Animal Behaviors Ecology Physical Education and Health My Teeth Cells, Tissues and OrgansOther quiz:
Health › ViewDaily exercise and weight control strongly influence your chances of staying _______.
A. health
B. healthy
C. healthily
D. active
Enzymes › View
What happens to enzymes at the end of a chemical reaction?
A. They are used up.
B. They are unchanged.
C. They become less effective.
D. They are broken down.