Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

The Architectural Marvel of the Human Foot

The human foot contains 26 bones, 33 joints, and over 100 muscles, tendons, and ligaments — a complex mechanical system designed to bear body weight, absorb impact, and propel the body forward with remarkable efficiency. Understanding basic foot anatomy helps patients make sense of diagnoses, treatment recommendations, and surgical discussions. At Balance Foot & Ankle in Howell and Bloomfield Township, Michigan, we believe informed patients achieve better outcomes.

The Bones: Three Regional Groups

The hindfoot comprises the calcaneus (heel bone — the largest foot bone, bearing most body weight) and the talus (sitting above the calcaneus, forming the ankle joint with the tibia above and the subtalar joint below). The midfoot comprises five bones: the navicular (inner midfoot), cuboid (outer midfoot), and three cuneiforms (medial, intermediate, and lateral — in the middle of the midfoot). The forefoot comprises five metatarsals (the long bones leading to the toes) and fourteen phalanges (the toe bones — three in each lesser toe, two in the great toe). The sesamoids — two small bones under the first metatarsal head — are the 27th and 28th bones if counted.

The Three Arches

The foot has three arches that distribute weight and provide mechanical advantage: the medial longitudinal arch (the most prominent arch visible on the inner side of the foot), the lateral longitudinal arch (lower and along the outer foot edge), and the transverse arch (across the forefoot at the metatarsal level). These arches function as a dynamic spring system — flattening under load to absorb impact and rebounding to store energy for push-off. The plantar fascia, intrinsic muscles, and ligaments maintain arch integrity.

Key Joints and Their Functions

The ankle joint (tibiotalar) allows dorsiflexion (foot up) and plantarflexion (foot down). The subtalar joint (talocalcaneal) allows inversion and eversion — the side-to-side rocking that accommodates uneven terrain. The midtarsal (Chopart) joint allows additional hindfoot motion relative to the forefoot. The tarsometatarsal (Lisfranc) joint provides modest motion between midfoot and forefoot bones. The metatarsophalangeal (MTP) joints allow toe extension critical for normal push-off gait — particularly the first MTP joint which must dorsiflex significantly with each step.

Understanding Your Diagnosis

When your podiatrist explains that you have “plantar fasciitis” — inflammation of the band running from the calcaneus to the metatarsal heads — this anatomy context makes the diagnosis comprehensible. When you understand that the first MTP joint must dorsiflex 65+ degrees with each step, hallux rigidus (stiff big toe) makes sense as a significant functional limitation. Contact Balance Foot & Ankle at (810) 206-1402 — we take time to explain your specific anatomy and how your condition relates to it.

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Balance Foot & Ankle — Howell & Bloomfield Township, MI

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Understanding Foot Anatomy for Better Foot Health

Understanding the complex anatomy of your foot helps you recognize problems early and communicate effectively with your podiatrist. At Balance Foot & Ankle, Dr. Tom Biernacki uses patient education as a cornerstone of care, helping you understand your diagnosis and treatment options.

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Clinical References

1. Sarrafian SK, Kelikian AS. Sarrafian Anatomy of the Foot and Ankle: Descriptive, Topographic, Functional. 3rd ed. Philadelphia: Lippincott Williams & Wilkins; 2011.
2. Netter FH. Atlas of Human Anatomy. 7th ed. Philadelphia: Elsevier; 2019.
3. Mann RA, Coughlin MJ. Surgery of the Foot and Ankle. 8th ed. St. Louis: Mosby; 2006.

Your Board-Certified Podiatrists

Dr. Tom Biernacki, DPM

Board-Certified · FACFAS

Dr. Carl Jay, DPM

Board-Certified Podiatrist

Dr. Daria Gutkin, DPM

Podiatrist

Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.