Here we have the macrostructure of the kidney, featuring the blood supply to be filtered and the ureter carrying urine off to the bladder. The renal pyramids contain parallel rows of nephrons, which allow for precise regulation of blood filtration, while controlling for volume and content.

This diagram depicts the life cycle of a keratinocyte (skin cell) as it proliferates, differentiates, migrates to the surface, and dies, forming a protective barrier over the body that defends against infection. 

This is the basic anatomy of the human eye. We can see the layers of retina, choroid and sclera around the vitreous humour, along with the structures surrounding the pupil.

The panaceas and the gallbladder are important accessory organs attached to the duodenum (small intestine). The gallbladder produces bile and the pancreas produces enzymes, which aid in the digestion of proteins, carbohydrates and lipids. 

This picture gives a simplified version of the neural control of urination. We can see the bladder as well as the internal and external sphincters of the male urinary tract. Stretch receptors in the bladder communicate with the brain stem via nerves in the sacral vertebrae, while somatic nerves control the sphincters. 

Deoxygenated blood arrives from the bodily tissues to the right atrium via the superior and inferior vena cava. It travels through the pulmonary trunk towards the lungs for gaseous exchange. Oxygenated blood returns to the left atrium, and is pumped through the aorta towards the bodily tissues by the left ventricles’ powerful contraction. I thought the heart shaped candy was the best choice for the myocardium, reflecting the thickness of the muscle.

This picture shows how RANK (Receptor Activator of Nuclear Factor Kappa B) regulates Osteoclast differentiation and activation. A human bone is constantly undergoing remodeling—the Osteoclast cells dissolve the bone, allowing calcium to enter the blood. Osteoblast cells lay down new bone surface.