Reviewed By Dr. Ezekiel Oburu (M.D, PhD, FACR) What Is Osteoarthritis? Osteoarthritis is the most common form of arthritis, affecting millions of people worldwide. It occurs when the protective cartilage that cushions the ends of your bones wears down over time. The wearing of cartilage causes the bones to rub against each other. This can … Read more
The heart is a pump made up of muscle tissue. Like all muscle, the heart needs a source of energy and oxygen to function. The heart’s pumping action is regulated by an electrical conduction system that coordinates the contraction of the various chambers of the heart. The Electrical pulses in the heart are controlled by … Read more
What Is Octane Number? An octane rating also referred to as octane number, is a standard measure of an engine or aviation gasoline capability against compression. The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power output or the energy content of the fuel per unit mass … Read more
What Is Centripetal Force? According to Newton’s first law of motion, a moving body travels along a straight path with constant speed (i.e., has constant velocity) unless it is acted on by an outside force. For circular motion to occur there must be a constant force acting on a body, pushing it toward the center of the … Read more
What Is DIAC (Diode For Alternating Current)? DIAC is a bidirectional semiconductor switch that can be turned ON in both forward and reverse direction. The device is a member of the Thyristor family and it is mostly used in triggering TRIAC and other Thyristor based circuits. The DIAC starts conducting electric current if the applied … Read more
A gland is an organ which produces and releases substances that perform a specific function in the body. There are two types of gland. Endocrine glands are ductless glands and release the substances that they make (hormones) directly into the bloodstream. These glands form part of the endocrine system and information on them is included … Read more
What Are Isotopes? Isotopes are two or more types of atoms that have the same atomic number (number of protons in their nuclei) and position in the periodic table (and hence belong to the same chemical element), and that differ in nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei. While all isotopes of a given element have almost the same chemical properties, they … Read more
What is heat? Heat is the form of energy majorly due to temperature differences or increase in molecular kinetic energy. In other words, heat is energy transferred from one system to another solely by reason of a temperature difference between the systems. Heat exists only as it crosses the boundary of a system and the … Read more
In humans each lung is encased in a thin membraneous sac called the Pleura, and each is connected with the trachea (windpipe) by its main bronchus (large air passageway) and with the heart by the pulmonary arteries. Each Pleura can be divided into two parts: Visceral pleura-envelops the lung. Parietal pleura- covers the internal surface … Read more
Octahedral Complexes Octahedral complexes have six ligands symmetrically arranged around a central atom, defining the vertices of an octahedron. Octahedral molecular geometry describes the shape of compounds wherein six atoms or groups of atoms or ligands are symmetrically arranged around a central atom. The octahedron has eight faces, hence the prefix octa-. An example of … Read more