Topics: Respiratory and Circulatory Quiz
The gas that we inhale and is needed by the cells of the body.
A. oxygen
B. nitrogen
C. carbon dioxdie
D. unleaded
Select your answer:

Topics:
Medicine Clinics Forensics Terms Diseases and Preventions Musculoskeletal System Food Microbiology Hormones Fitness Enzyme Composition of Blood and Blood Cells Sources Of Food Water Macromolecules Hospital Unit Circulatory and Respiratory System Skin Biopsychology - Neuroplasticity and Functional RecoveryOther quiz:
Male Reproductive System › ViewOne key advantage of asexual reproduction is
A. Offspring complete for food and space
B. It allows organisms to reproduce quickly
C. Extreme temperatures can wipe out entire populations
D. Offspring are different than parent organism
Physical › View
Why body posture very important during throwing?
A. To make us stable
B. To avoid injury
C. Just for fun