Cardiovascular system

A four-chambered muscular pump at the center of two connected circulatory loops.

The thick-walled chamber that propels blood into the aorta and systemic circulation.

The chamber that sends venous blood through the pulmonary trunk toward the lungs.

The two receiving chambers that pass venous return into the ventricles.

Thin tissue structures that keep blood moving in one direction through the chambers.

Surface vessels that supply and drain the heart muscle itself.

The large arteries and veins that connect the heart with pulmonary and systemic circuits.

Paired thoracic organs organized into lobes and bronchopulmonary segments.

A cartilage-supported airway connecting the larynx to the main bronchi.

The internal ridge at the division of the trachea into the main bronchi.

The first two branches carrying air from the trachea into each lung.

Repeated airway branches distributing air through lobes and pulmonary segments.

Four source objects shown together in their shared abdominal coordinate frame.

A large upper-abdominal organ that processes absorbed material and produces bile.

The transverse gateway where major vessels and ducts enter or leave the liver.

A glandular organ with digestive and endocrine functions across the upper abdomen.

The first small-intestinal region, receiving material from the stomach and accessory secretions.

The middle small-intestinal region where digestion and absorption continue.

The distal small-intestinal region leading to the ileocecal junction.

The caecum, colon, and rectum that reclaim water and consolidate digestive waste.

A narrow, blind-ended tube arising from the caecum.

Paired filters connected to a muscular reservoir and outlet.

Paired organs that filter plasma and regulate fluid, electrolyte, and acid-base balance.

The outer renal region containing glomeruli and much of the nephron tubule system.

Conical medullary territories that converge toward renal papillae.

A branching funnel that receives urine and narrows into each ureter.

Paired muscular conduits carrying urine from renal pelves to the bladder.

A distensible pelvic organ that stores urine between voids.

A triangular bladder-base region defined by two ureteral openings and the internal urethral opening.

The sex-specific tube carrying urine from the bladder to the exterior.

The brain and spinal cord shown as one continuous central anatomical territory.

Anterior cortical territories involved in planning, action, language, and executive control.

Posterior-superior cortical territories integrating somatic sensation and spatial information.

Lateral and medial temporal structures important to audition, recognition, and memory.

Posterior cortical territories that participate centrally in visual processing.

Deep paired nuclei that participate in selecting and coordinating action and behavior.

Paired deep-brain relay and integration territories composed of many distinct nuclei.

A densely folded structure that coordinates movement, timing, balance, and motor learning.

The largest commissural fiber system connecting the two cerebral hemispheres.

Thirty named source segments spanning cervical, thoracic, lumbar, and sacral levels.

Bilateral optical and neural organs shown at matched magnification.

Clear anterior domes that provide most of the eye's fixed refractive power.

A contractile pigmented diaphragm surrounding the variable optical opening.

Flexible transparent bodies that fine-tune focus onto the retina.

Light-sensitive neural layers converting photons into patterns of electrical activity.

Central retinal territories supporting high-acuity, detailed vision.

Retinal landmarks where ganglion-cell axons and retinal vessels leave the eye.

A registered thymus and spleen plus a generalized lymph-node structural reference.

A bilobed organ where developing T cells mature and undergo selection.

A blood-filtering immune organ that samples circulating material and supports immune responses.

A communication hub where lymph-borne material is sampled by organized immune-cell territories.

Organized cortical territories associated strongly with B-cell responses.

A deeper cortical territory enriched in T cells and antigen-presenting interactions.

The central node territory where sinuses and immune-cell cords converge toward outflow.

A complete articulated reference from the cranial bones to the distal phalanges of the feet.

Cranial and facial bones protecting the brain and shaping the orbits, nasal cavity, and jaws.

A segmented central column protecting the spinal cord while transmitting load through the trunk.

Ribs and sternum enclosing the thorax while moving with breathing.

Shoulder girdles and arm, forearm, wrist, hand, and finger bones arranged for reach and dexterity.

Paired hip bones forming the socket-bearing bridge between the spine and lower limbs.

Femora, patellae, leg bones, ankles, feet, and toes forming the principal weight-bearing limbs.