Let's take a look at the pictures of organs donated by deceased owners for medical purposes. There are images that will scare viewers, but it cannot be denied that the internal parts of the human body are very beautiful.
Digestive part

Your complete nervous system

This is the intact nervous system that was dissected by two medical students in 1925. It took more than 1500 hours to complete, there are only four copies in the world.
Circulatory system
Blood vessels of a baby

Blood vessels in the palm of the hand

The network of blood vessels of the human body

The vascular system circulates on the face

Anatomical model highlighting the arteries and veins of the face and scalp

The network of blood vessels supplies the heart muscle with nutrients and oxygen

This mold is created by pumping a special liquid into the real heart. When this substance fills blood vessels, and is fixed, the tissue is dissolved to leave a perfect copy of the cardiovascular system.
The blood transfusion system of the heart muscle

Vascular system of the upper body

Photo of a healthy heart

A completely drained heart

Central nervous system to feel the pain of teeth and face

Nervous system in detailed form

Anatomical model of the hand

Cerebellum, cerebral hemisphere and brain stem

The bathtub filled with human brains was preserved and found in an abandoned Texas refugee camp

Detailed model of internal organs

Source: Creepypasta Vietnam