FMA132951 3D mesh
Diaphragm
A broad muscle separating the chest and abdomen. When it contracts, it increases chest volume and helps draw air into the lungs.
Skeletal muscles generate movement by pulling on their attachments. Together with tendons, they move joints, stabilize posture, and produce heat.
The BodyParts3D reference atlas contains 402 modeled muscular pieces across 376 FMA concepts, including respiratory muscles (diaphragm), trunk stabilizers, head/neck muscles, and upper/lower limb compartments.
Generates mechanical force by contracting and pulling on bony and fascial attachments.
Moves synovial joints across the axial and appendicular skeleton.
Maintains upright posture and stabilizes joints during rest and locomotion.
Produces metabolic heat to support body temperature regulation and drives respiratory mechanics via the diaphragm.
Review the primary anatomical landmarks below. Click Learn more to open the dedicated page for each structure, or click Select in 3D to inspect it on the interactive 3D model.
A broad muscle separating the chest and abdomen. When it contracts, it increases chest volume and helps draw air into the lungs.
A broad muscle in the posterior compartment of the lower leg that plantarflexes the foot at the ankle joint and assists in standing posture.
A fan-shaped muscle lining the iliac fossa of the pelvis that acts with the psoas major to flex the thigh at the hip joint.
A long, strap-like muscle on the medial aspect of the thigh that adducts the hip and flexes the knee.
A superficial sheet of muscle in the anterior neck that tenses the skin of the neck and helps depress the mandible and lower lip.
An infrahyoid muscle in the neck connecting the scapula to the hyoid bone, acting to depress and stabilize the hyoid during swallowing and speech.
Every anatomical structure assigned to the Muscles layer in atlas.json. Curated landmarks include a Learn more guide, and all 376 structures can be selected directly in the 3D viewer.
Launch the 3D viewer with the Muscles activated. Orbit the camera, use the Exploded View slider to separate overlapping pieces, and click individual structures to inspect their FMA reference ID and anatomical metadata.
You have not selected any structures in the Muscles inside the 3D viewer yet during this session. Click Explore in 3D or any structure card above to inspect a structure on the 3D model.
Skeletal muscles act by pulling on their attachments rather than pushing.
The diaphragm (FMA13295) separates the thoracic and abdominal cavities and drives inhalation.
Together with tendons, skeletal muscles move joints, stabilize posture, and generate heat.
The 3D atlas models 402 distinct muscular pieces that can be inspected in assembled or exploded view.
Muscles pull on skeletal attachments to move bones at joints and hold the skeleton in postural alignment.
Tendons, aponeuroses, and fascial sheaths transmit the contractile force of skeletal muscles onto bones and cartilage.
Contraction of the diaphragm and intercostal muscles changes intrathoracic pressure to draw air into the lungs.
Select an answer for each question below to verify your understanding of the muscles.