Blood vessels

The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.

Endocrine system

Glands of the endocrine system secrete hormones into the blood.

Flat feet

Flat feet, or fallen arches, may cause a number of health problems.

Human evolution

The brain and skull underwent significant changes during human evolution.

Female reproductive system (basic)

The reproductive system is a series of organs working together for the purpose of reproduction.

Genome editing

Genome editing is a type of genetic engineering which results in changes in the genome of an organism. This animation presents one of the best-known genome...

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