Biology

Oxidative Stress (Effects: Health, Biological, and Chemical) Definition: Oxidative stress reflects an imbalance between free radicals and antioxidants in our body. It occurs when excess oxygen radicals…

DNA repair (Mechanisms) Definition: DNA repair mechanisms comprise relatively simple single-step enzyme reactions catalyzed by monomeric proteins which directly reverse base damage to DNA. In…

DNA repair (Damage and Sources) Definition: DNA repair, any of several mechanisms by which a cell maintains the integrity of its genetic code. In human…

Meiosis (Functions and Importance) Definition: Meiosis (/maɪˈoʊsɪs/; from Greek μείωσις, meiosis, which means lessening) is the process in eukaryotic, sexually-reproducing animals that reduces the number…

Meiosis (Phases) Definition: Meiosis (/maɪˈoʊsɪs/; from Greek μείωσις, meiosis, which means lessening) is a specialized form of cell division that produces reproductive cells, such as…

Respiratory System (Anatomy) Definition: The respiratory system (also referred to as the ventilator system) is a complex biological system comprised of several organs that facilitate…

Pulmonary Alveolus Definition: Pulmonary alveolus (plural: alveoli, from Latin alveolus, “little cavity”), informally known as air sac, is any of the innumerable minuscule, thin-walled, capillary-rich…

Epidermis Definition: The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis.…

Metencephalon Definition: Metencephalon is generally considered a part of the brain that largely consists of the brain’s cerebellum and pons. It contains a portion of…

Lymphatic System Definition: Lymphatic System is a collection of organs, tissues, ducts, and vessels that help to make or transport lymph. Lymph is a clear-to-white…

Vitex Peduncularis Plant Vitex is a genus of about 250 species of shrubs and trees from 1-35 m tall, native to tropical, subtropical and also…

Active Transport Definition Active transport is the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is,…