Cell Membrane or Cytoplasmic Membrane
The cell membrane is a thin flexible layer around the cells of all living things. It is a double layer of lipids and proteins that…
Biology
Apoptosis
Apoptosis is the controlled death of a cell. It is a form of programmed cell death, or “cellular suicide”. It plays an integral part in…
Inferior Vena Cava (IVC)
Inferior Vena Cava (IVC) Definition: Inferior vena cava (or IVC) is a large vein that carries de-oxygenated blood from the lower body to the heart.…
Oxidative Stress (Effects: Health, Biological, and Chemical)
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)
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)
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)
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)
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)
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
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
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
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…
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