Why 4D Interactive Anatomy?
Computer generated 3D anatomy models don't cut it?
You are at the right place. We dissect and scan consented donors layer-by-layer to replicate the level of detail that you can only see in the lab.
Access the scans on our website from any device, no software needed. Log in, rotate & dissect the digitally immortalized donors again-and-again to study or teach real human anatomy.
With over 3500 anatomical structures labelled by professional staff across 12+ million images in English, Latin, Spanish, and Ukranian you can get a true understanding of human anatomy. Use our anatomy quizzes to practice or teach.
Try for freeKey features
Real donors
Study or teach real anatomy as if you were in the lab. No formaldehyde needed.
Rotate and dissect
Rotate specimens and remove or rebuild layers to review structures. Repeat again-and-again.
100+ interactive scans
Explore the human body from head to toe. New scans are continuously added for free.
Pass the exam
Focus on the structures you need to know with our structure list-based quizzes.
Teach anywhere
Limited availability of donors or none at all? With digital cadavers you can teach anywhere.
All devices supported
Access from any laptop, phone, tablet, etc. No software download needed.
What our customers are saying
“You always have 4D Anatomy with you so you do not need to book time and commute to the crowded dissection room. You can use it to study the real thing from home, without the time pressure.”
Johanna K.
2nd year GM Student
"I really love the multiple levels of dissection sophistication that 4DIA offers to our students and faculty. The best part of the software is that students can “dissect,” then “un-dissect,” then “re-dissect”."
Jonathan J. Wisco, Ph.D.
Boston University
Aram V. Chobanian & Edward Avedisian School of Medicine
Used by Top Universities Worldwide
Digital Cadaver Dissections
Our layer-by-layer scanning approach enables you to dissect or rebuild the donors as many times you need to. Our scans can help you understand complex regions such as the anatomy of the head & neck, the brachial plexus, or the abdominal cavity. As we scan by regions, here are some of the dissections we are most proud of:
Head & Neck with upper chest
Explore the most important and complex anatomical structures of the head and neck with our multi-layer scans. Our comprehensive scans cover the surface and deep layers of the skin, fascia, muscles, viscera, blood vessels, and nerves, including structures such as the skull, mandible, hyoid bone, sternocleidomastoid, trapezius, cervical fascia, scalene muscles, thyroid gland, larynx, and pharynx. Our scans are perfect for medical students, healthcare professionals, and anyone interested in the human body. Start exploring our website now and gain a deeper understanding of head and neck anatomy.
Head & Neck with Back
This innovative anatomical module allows you to explore the complexities of cranial and neck anatomy with astonishing realism. From the intricate network of nerves and vessels to the delicate facial and neck muscles, every feature has been meticulously dissected to help you grasp the intricacies of this vital region. Remove or rebuild the 29 separate layers to view the cervical spinal nerve roots, back muscles, and more in astonishing details.
Brain dissection
This scan reconstructs the prosection of the brain including surface anatomy of the cerebral cortex and the base of the brain, the ventricular system the brainstem and the cerebellum. Anatomy of intracranial vessels such as the carotid and vertebrobasilar system, neural structures such as the cranial nerves are shown. Remove layers to dig into the depths of the brain and explore the surface anatomy of the cortex and even the subcortical structures that lie beneath. Discover the thalamus, serving as a relay station for sensory information. Identify the basal ganglia, responsible for motor control and reward processing or the hippocampus, crucial for memory formation.
Brain Slices (Coronal Sections)
Dive into the complex structures of the brain like never before. With the help of our multiple sagittal, coronal and transverse section modules, you can immerse yourself in the captivating world of neuroanatomy. Every sulcus, gyrus, and fissure is represented, allowing you to explore the brain's intricate structures with astonishing clarity. Whether you're investigating the anatomy of the thalamus or the hippocampus, analyzing the connections of the corpus callosum, or studying the intricacies of the ventricular system, our scans serve as a gateway to a deeper understanding of this remarkable organ.
Chest & Upper Abdomen
Do you need to know more of the anatomy of the heart, lungs, kidneys? We got you covered! Besides the complete scans of the most important anatomical regions, we will also provide you with the detailed scans of the individual organs. These individual scans offer you the chance to study the internal organs with an even greater detail.
Whether you're exploring the ventricles of the heart, investigating the filtration processes of the kidneys, or unraveling the mysteries of the reproductive system, our scans offer an immersive and comprehensive learning experience.
Heart (ventral)
From the powerful ventricles to the delicate atria, and from the intricate network of coronary arteries to the majestic aorta, our multiple heart modules capture the nuanced details that make the heart a true marvel of engineering. Each modules is dissected differently! Whether it's examining the intricacies of the heart valves, tracing the branching pathways of the coronary circulation, or studying the interplay between the atria and ventricles, you will find the one best fit to your needs.
Inguinal & Gluteal Region (Right)
From the bony landmarks of the pelvis to the intricate arrangement of muscles, ligaments, and nerves, every detail has been meticulously replicated, allowing you to explore the regions' anatomy with astonishing clarity. From the inguinal ligament to the femoral nerve, from the gluteus maximus to the piriformis muscle, our scans capture the nuanced details that make these regions so remarkable. Explore the inguinal canal, trace the path of the femoral vessels, or examine the complexities of the gluteal muscles and their attachments. Our module brings the intricate anatomy of these regions to vivid life.
Retroperitoneal Region
One of the most challenging areas of the human body is the retroperitoneum, presenting complexities that can leave even seasoned professionals perplexed. But fear not, because with our module, navigating this intricate region will become a breeze! Rotate, dissect, and manipulate the virtual representation of the retroperitoneum, allowing you to grasp its spatial relationships and anatomical variations with unparalleled ease. In this module we wanted to emphasize the anatomy of the kidneys, their blood supply by the great vessels.
Pelvis & Perineum (Female)
Our module presents an unparalleled level of detail, meticulously showcasing the structures within the female pelvis and perineum. From the reproductive organs, such as the uterus, ovaries, and fallopian tubes, to the pelvic floor muscles, ligaments, and nerves, every intricate element has been intricately captured. Explore the complexities of the broad ligament, examine the arrangement of the levator ani muscles, and delve into the detailed anatomy of the external genitalia. Our module provides an immersive experience that highlights the nuanced structures that make this region truly remarkable.
Knee (Right)
The importance of understanding the intricate anatomy of the knee joint cannot be overstated. As one of the most crucial weight-bearing joints in the human body, the knee plays a pivotal role in our mobility, stability, and overall quality of life. The knee joint is a true marvel of engineering, seamlessly combining stability and flexibility. Its intricate design allows for smooth movements, such as walking, running, and jumping, while providing the necessary support to withstand the forces exerted on the lower limb. From the articular surfaces of the femur, tibia, and patella to the complex network of ligaments, tendons, and cartilage, every component of the knee joint contributes to its remarkable functionality. Delving into the anatomy of the knee joint unveils the secrets behind its stability and motion. The ligaments, including the anterior and posterior cruciate ligaments and the medial and lateral collateral ligaments, act as strong bands of connective tissue, providing stability and preventing excessive movements. The menisci, made of fibrocartilage, help distribute the forces evenly across the joint and enhance its stability. The intricate coordination of muscles, such as the quadriceps, hamstrings, and calf muscles, adds further control and precision to the knee's movements. By understanding these intricate structures and their interactions, healthcare professionals can diagnose and treat knee injuries more effectively.
Real Bone (Osteology) Scans
Explore the bones in the body through our interactive scans. Highlight, identify, and study muscle origins & insertions or ligaments. Rotate and zoom to reveal fine details such as the arachnoid process or the mastoid process on the skull. These are some of our most useful scans:
Skull Base (Internal)
The skull base forms the foundation upon which the brain rests, safeguarding and supporting this essential organ. Delve into the detailed anatomy of this region and witness the convergence of various bony structures, such as the frontal, ethmoid, sphenoid, and temporal bones. Appreciate the complex network of foramina and canals that allow the passage of the twelve cranial nerves, blood vessels, and other vital structures. Explore the intricate anatomy of the cribriform plate, the optic canal, the superior orbital fissure, and the foramen magnum. Our module illuminates the structural foundation of the skull base, providing a deeper understanding of its role in protecting and nurturing the brain.
Skull Base (external)
In this module you can study the skull base and the facial cranium from an external view. Witness the intricate canals, foraminas, fissures, grooves that accommodate and protect vital structures such as the brain, cranial nerves, and major blood vessels. You can also examine the facial cranium, the framework that gives shape to our unique facial features.
Mandible
The mandible showcases exquisite structural elegance, serving as the foundation for the lower part of the face.The mandible is not only aesthetically pleasing but also crucial for essential functions such as chewing, speaking, and supporting the surrounding tissues. Explore the temporomandibular joint (TMJ), where the mandible articulates with the temporal bone, facilitating smooth jaw movements. Witness the attachment sites for powerful muscles involved in mastication, enabling efficient food processing. Delve into the detailed anatomy of this robust bone, which consists of a curved body and two vertical extensions called the rami. Observe the symmetrical structure, the distinct angles, and the smooth contours that define its aesthetic appeal.
Cervical Spine
Our module invites you to explore the intricate realm of the cervical spine, a remarkable structure that provides flexibility, stability, and crucial support to the human body. The cervical spine, consisting of seven vertebrae labeled C1 to C7, forms the foundation of the neck. Marvel at its unique structure, designed to strike a delicate balance between mobility and strength. Observe the elegant curves, the interlocking joints, and the intricate vertebral processes that contribute to the overall flexibility and stability of the cervical spine. Our module provides a detailed exploration of the architectural marvel of the cervical vertebrae, allowing you to appreciate their distinct characteristics. The cervical spine holds immense clinical significance across various medical specialties. Orthopedic surgeons rely on their knowledge of cervical spine anatomy to diagnose and treat conditions such as cervical disc herniation, spinal stenosis, or fractures. Radiologists meticulously analyze imaging studies to identify abnormalities or pathologies affecting the cervical spine. Physical therapists and chiropractors employ specialized techniques to alleviate pain, restore mobility, and improve overall function. Our module equips medical professionals with the comprehensive insights necessary for accurate diagnosis, treatment planning, and rehabilitation strategies.
Thoracic Spine
The thoracic spine, comprised of twelve vertebrae labeled T1 to T12, stands as a remarkable testament to structural brilliance. Appreciate the intricate interplay between the vertebrae, the intervertebral discs, and the rib cage, forming a harmonious union that allows for both protection and flexibility. Our module provides a detailed exploration of the architectural marvel of the thoracic spine, offering insights into its exceptional structure.
The thoracic spine also plays a crucial role in supporting the upper body, protecting the vital organs within the chest cavity, and facilitating various movements. Explore its incredible ability to provide a stable foundation for the rib cage, allowing for respiratory functions and protecting the heart and lungs.
Lumbar Spine with Sacrum
The lumbar spine, consisting of five vertebrae labeled L1 to L5, along with the triangular-shaped sacrum, showcases structural brilliance like no other. Observe the robustness of the lumbar vertebrae, designed to bear significant loads and facilitate a wide range of motions. Witness the fusion of the lumbar spine with the sacrum, forming a strong foundation for the pelvis. Appreciate the interplay between the vertebrae, the intervertebral discs, and the sacroiliac joints, which provide stability and support for the lower back. Our module offers detailed exploration of the lumbar spine and the sacrum, providing insights into its unique characteristics.
Pelvis
The pelvis, consisting of the hip bones, sacrum, and coccyx plays a pivotal role in various vital functions of the human body. With it's elegant curvature, robustness, and the harmonious fusion of the pelvic bones which contributes to its stability and strength it creates a protective basin for vital organs and support the weight of the upper body. Explore its remarkable ability to support the spine, transfer loads from the upper body to the lower limbs, and facilitate movements such as walking, running, and childbirth. With our module, you'll gain valuable insights into the functional excellence of the pelvis, enhancing your understanding of its crucial role in everyday activities. Whether you're a medical student, orthopedic surgeon, gynecologist, radiologist, or anatomy enthusiast, our module elevates your expertise in pelvic anatomy. Gain a deep understanding of its structural nuances, functional significance, and clinical implications.
Pathologies, Novel Variations, Surgical Approaches, and more
While our main focus remains on doing meticulous, multi-layer dissections, we have also created some other scans that are interesting or may be considered as novelties. These are from the anatomical collections of universities and some speciality scans we developed on-demand.
Ischemic Stroke
Our scans also offer you an opportunity to explore the field of pathophysiology. With the ischemic stroke module you can get a deeper understanding of a condition that so profoundly impacts patients lives. Dvelve into the mechanisms underlying ischemic stroke, where a blockage or reduced blood flow to a specific brain area disrupts its oxygen and nutrient supply. Witness the consequences of ischemia as brain cells become deprived of vital resources, leading to cellular dysfunction and later the inevitable tissue damage.
Thoracic Organs of a Child
From the moment of birth until adolescence, children undergo a remarkable transformation in their anatomy, encompassing numerous distinct features and physiological adaptations. Understanding their ever changing anatomy is crucial for pediatricians, surgeons as it aids in the diagnosis, treatment, and overall care of young patients. In these moduls, we delve into the fascinating world of paediatric anatomy and explore some of its key aspects.
Frontolateral Aproach (Skull Base)
This interactive dissection demonstrates a frontal-frontolateral approach to the optic-carotid region, focusing on the skull base. The head is inverted to mimic neurosurgical exposures. Initially, the left frontal lobe is partially covered by the dura mater, while the upper wall of the orbit is removed to reveal the lacrimal gland. The dissection exposes the fissure between the cerebrum and skull base. Steps involve removing the dura mater and exposing the Sylvian fissure, revealing branches of the middle cerebral artery. The optic nerve, carotid triangle, and skull base are visualized. Finally, the basilar artery, cerebellar arteries, and posterior cerebral arteries are revealed.