A spherical shell that is usually made of a biodegradable or resorbable plastic polymer, that has a very small diameter usually in the micrometer or nanometer range, and that is often filled with a substance (as a drug or antibody) for release as the shell is degraded...
This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..
Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..