Select your answer:
Topics:
Digestive System Weight Management Hemodynamic Disorder Blood Groups RDA Dental Caries Musculoskeletal Fitness Renal Pharmacology Pathophysiology_Endocrine Neurons Bone Physiology Nucleic Acids Medical Vocabulary Biotechnology: Tools & Techniques MEDICINE Musculoskeletal DiseasesOther quiz:
Human Anatomy › ViewHuman lungs contain approximately _______ miles of airways and over 300 million alveoli
A. 500
B. 1000
C. 1500
D. 2000
Skin Structure, Growth & Nutrition › View
Skin gets its strength, form and flexibility from _______.
A. collagen and keratin
B. sebum and melanin
C. keratin and elastin
D. collagen and elastin