Illustration depicting the deep muscles of the gluteal region, including the quadratus femoris, obturator internus, piriformis, and gemelli muscles.

Quadratus Femoris

Illustration of the quadratus lumborum muscle in the posterior abdominal wall.

Quadratus Lumborum

Illustration of the anterior thigh muscles, color-coded with a legend identifying psoas major, iliacus, rectus femoris, vastus medialis, vastus lateralis, sartorius, and pectineus.

Quadriceps Femoris

Illustration of the second layer of the plantar muscles, highlighting the quadratus plantae and lumbricals in the human foot.

Quadratus Plantae

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Diagram illustrating the external and internal intercostals muscles of the thoracic wall.
Encyclopaedia

Internal Intercostals

by Dr Oliver Jones

Illustration of intraperitoneal and retroperitoneal organs for anatomical reference.
Areas of the Abdomen

The Peritoneum

by Katie O'Neill

Illustration of the fourth layer of the plantar muscles, featuring the unipennate plantar interossei and bipennate dorsal interossei.
Encyclopaedia

Plantar Interossei (Foot)

by Sanya Trikha