Lethargy Definition and Examples - Biology Online Dictionary

Lethargy (Science: symptom) abnormal drowsiness or stupor, a condition of indifference. Origin: gr. Lethargia = drowsiness..

Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..

Genes are the blueprint of our bodies, a blueprint that creates a variety of proteins essential to any organism's surviv..

This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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