Daily question Lets nerd out on some basic science anatomy stuff

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Feb 23, 2026, 5:31:38 AMFeb 23

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Which of these is true of normal tendon structure?

A. Vascular and lymphatic supply is contained in the loose connective tissue sheath of the endotenon

B. Collagen type III makes up about 80% dry weight of the tendon

C. Water accounts for about 70% of tendon mass

D. The osseotendinous junction is the weakest part of the muscle/tendon unit

E. The majority of the blood flow to the tendon midportion arises from vessels originating at the myotendinous junction

Scott E Rand, MD FAAFP CAQSM

Director, Primary Care Sports Medicine Fellowship

Co Director of Sports Medicine, Houston Methodist Orthopedics and Sports Medicine Willowbrook

Assistant Professor of Clinical Family Medicine Houston Methodist Academic Institute

Adjunct Assistant Professor of Family and Community Medicine, Texas A&M University

Assistant Professor of Family Medicine in Clinical Medicine Weill Cornell Medical College.

13802 Centerfield Dr Suite 300

Houston, TX 77070

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