Human Torso with Muscles and Open Back, 27 Parts

Quick Answer: The human torso with muscles and open back, 27 parts, is a detailed torso that shows superficial muscles on its surface, an opened back exposing the vertebral column and spinal cord, and internal organs that separate into 27 pieces. This 27 part torso model is used in medical, physiotherapy, nursing and sports science courses.

Muscles, Spine and Organs Together

Most torsos teach the organs; this one adds the musculoskeletal layer. Muscles modelled on the surface let students trace the trapezius over the shoulders and upper back, the deltoid capping the shoulder, pectoralis major across the chest, and rectus abdominis and the obliques on the abdominal wall. Relating these to the organs beneath shows, for example, how the abdominal muscles protect the viscera and assist forced breathing.

The open back is the second difference. With the posterior wall removed, the vertebral column can be followed from the neck to the sacrum, the spinal cord is visible inside the vertebral canal, and paired spinal nerves leave between the vertebrae. Physiotherapy and sports science students use this view to connect back muscles, spine and nerve roots when they study posture and back pain.

Its 27 parts make this the most divided torso in this part of the range, but the title does not say how they are split or whether reproductive organs are included; unlike the 23 part torso, interchangeable sex organs are not mentioned. The spine anatomy poster complements the open-back view.

Specifications

Applications

• Physiotherapy and sports science teaching of trunk muscles and the spine together
• Medical and nursing anatomy in which organs, spinal cord and body wall are studied on one model
• Explaining how the diaphragm and abdominal muscles work in breathing
• Practical examinations using tagged or numbered structures

Care & Handling

• Support the 27 part torso model under its base when moving it; the open back makes it less rigid than a closed torso.
• Avoid pressing on the modelled spinal nerves and the edges of cut muscles, which chip.
• Record the order in which the 27 parts come out so that reassembly at the end of a lesson is quick.

Why Choose LabEquip

Physiotherapy schools, sports science departments and medical colleges choose this torso when muscles and spine matter as much as the organs. Find it under LabEquip’s biology lab products, and ask through the LabEquip contact page for the parts breakdown.

Frequently Asked Questions

Why choose a torso with muscles?

Muscles on the surface let students relate the body wall to the organs beneath it, which a skin-covered torso cannot do. This suits physiotherapy, sports science and anatomy courses where movement and posture are studied.

What can be seen through the open back?

The vertebral column from neck to sacrum, the spinal cord in its canal and the spinal nerves leaving it on each side. Some models also show the kidneys and back muscles from behind.

Which muscles move the shoulder?

Among the superficial ones, the deltoid raises the arm, pectoralis major pulls it forward and across the chest, and trapezius moves and steadies the shoulder blade. Deeper rotator cuff muscles stabilise the joint.

How do abdominal muscles help breathing?

At rest, breathing out is mostly passive. During exercise or coughing, the abdominal muscles contract, pushing the abdominal organs up against the diaphragm and forcing air out faster.

Does this model have interchangeable sex organs?

The listing does not mention them, unlike the 23 part torso with sex organs, muscles and open back in the same range. Buyers who need both male and female reproductive inserts should choose that model or confirm this point when they enquire.

Why does the part count matter?

More parts usually means the organs are split into finer pieces, for example a heart that opens or intestines that separate from the stomach. That gives more detail to study, but also more pieces to account for after each lesson.

Last Updated: September 2026