The digestive tract and accessory organs

The primary specialized conductive structures that generate and propagate electrical impulses through the human heart.

Montana: boundaries + counties + names

The various elements of the acoustic guitar.

The main cellular components and organelles of a unicellular green alga.

The key inputs, outputs, and internal stages of photosynthesis within a chloroplast.

The 9 core mechanical and electrical components of a brushed direct current (DC) electric motor.

The main anatomical structures of pulmonary alveoli and their associated capillary blood supply.

The nine primary bones and skeletal regions of the human body in anterior view.

These are the core data types that come bundled with Python 3. Extension modules (written in C, Java, or other languages, depending on the implementation) can define additional types.