Written by Ma. Disa Ricafort Reviewed by Dr. Reuben J C. Los Baños, Ph.D. The circulatory system! It is the system responsible for the circulation of blood around the body. This system comprises the heart and an incredible number of vessels that carry blood to every extremity of your body. There is a lot to discuss here. Let’s begin by having a close peek at the heart. We often use the heart as the “symbol of love,” “seed of our soul,” or the “core of our being.” Sorry to burst your bubble, but… Read More

Written by Sheariah R. Torrillo Reviewed by Dr. Reuben J C. Los Baños, Ph.D. What are the major tissues of the nervous system? These cells are your neurons and glial cells. Your neurons are responsible for communicating through electrical signals. While your glial cells, also supporting cells, maintains the environment around your neurons. The nervous system has a vast array of functions. Being complex in nature, it can control your body’s internal environment to promote homeostasis and regulation. Even being complex, it only has two major types of cells in its nerve tissue… Read More

Written by Mary Abbygale Cabahug Reviewed by Dr. Reuben J C. Los Baños, Ph.D. Blood vessels are the conduits that transport blood throughout your body. They form a closed loop that starts and stops at your heart, similar to a circuit. Your heart vessels and blood vessels make up your circulatory system. Your body has around 60,000 miles of blood veins. Endothelial cells, smooth muscle cells, and extracellular matrix make up blood vessels. It includes your arteries and veins (including collagen and elastin). There are three concentric layers (or tunica): intima, medium, and… Read More

Written by Ysandra Prille A. Tabilon Reviewed by Dr. Reuben J C. Los Baños, Ph.D. Fibrous connective tissue (FCT) is the most diverse type of connective tissue in your body. It is also referred to as fibroconnective tissue or connective tissue proper. It is usually located in the muscles, tendons, bones, ligaments, and skin, among other places. As its name implies, it contains a lot of prominent fibers. To be precise, it consists of Collagen, Reticular, and Elastic fibers. Based on the relative quantity of these fibers, they can be loose or dense… Read More

Written by Jose Emmanuel Cisneros Reviewed by Dr. Reuben J C. Los Baños, Ph.D. The three types of cartilage in the body include elastic, hyaline, and fibrocartilage. These three tissues differ in their strength, body location, and extracellular matrix (ECM). Cartilage is a connective tissue denser than the blood but less dense than the bone. It has chondrocytes that produce extracellular matrix (ECM). It contributes to the growth of cells and tissues. These materials lie in spaces called lacunae housing eight chondrocytes each. This connective flesh in the body is flexible and avascular. Thus,… Read More

Written by Elisha Kristin Pasco Reviewed by Dr. Reuben J C. Los Baños, Ph.D. The cardiac muscles are also known as the myocardium. They make up the muscular middle layer of your heart and enable it to circulate the blood in your body. The myocardium is a muscle that you can only locate in your heart. Surrounding it is a thin outer layer called visceral pericardium or your epicardium. Your myocardium then covers the inner layer called the endocardium. The myocardium is responsible for the involuntary contraction and relaxation of your heart. It… Read More

Written by Naellah Yanca Marie P. Galve Reviewed by Dr. Reuben J C. Los Baños, Ph.D. The osteoblasts and osteoclasts are two types of cells found in the skeleton. The roles of osteoblasts and osteoclasts in skeletal maintenance are distinct. Osteoblasts are bone-builders, while osteoclasts are bone-eaters. While both take part in repair, they differ in managing their function. Osteoblasts are responsible for growth and development. In contrast, osteoclasts play a role in the resorption and degradation of bony tissue. Osteoblasts are uni-nucleated, cuboidal cells coming from the osteogenic cells in the periosteum…. Read More

Written by Ian Jay B. Francisco Reviewed by Dr. Reuben J C. Los Baños, Ph.D. Connective tissues occur throughout the body. They provide support, bind stuff together, and protect the body’s organs. Looking at a microscopic photo of connective tissues, you will see fibroblasts. Connective tissues consist of cells, protein fibers, and a ground substance. Fibroblasts are the most common cell type that you can find in a connective tissue specimen. They produce and maintain the extracellular matrix of your connective tissues. Fibroblasts secrete collagen proteins that support many tissues. They also help… Read More