The heart electrical signals are initiated in its natural pacemaker – the sinoatrial node, or SA node, and travel through the atria to reach the atrioventricular node, or AV node. The AV node is the gateway to the ventricles. The AV node passes the signals onto the bundle of His. This bundle is then dividedRead More Heart Blocks, Anatomy and ECG Reading, Animation.
Bariatric surgery, or weight loss surgery, refers to a variety of surgical procedures for treatment of morbid obesity. Obesity is determined by Body Mass Index or BMI, which is calculated as the ratio of body weight over square of body height. The higher the BMI the higher the extent of obesity. A normal BMI isRead More Roux en-Y Gastric Bypass, with Introduction on Body Mass Index, Animation.
the hypothalamus and pituitary gland are at the center of endocrine functions the hypothalamus is part of the brain while the pituitary also called hypophysis is an endocrine gland the hypothalamus links the nervous system to the endocrine system via the pituitary gland the two structures are located at the base of the brain andRead More Hypothalamus and Pituitary Gland Functions, Animation
Inflammation is the body’s protective response against infections or injuries. Inflammation mobilizes defensive cells to the site of injury, limits the spread of pathogens, eliminates them, and initiates tissue repair. Inflammation can occur in any organ, but is most common, and also most easily observable in the skin and underlying tissues. Typical signs include redness,Read More Inflammation, Animation
The human brain is divided into three major parts : – The cerebrum – the largest part of the human brain. The cerebrum enables sensory perception and controls voluntary motor actions. – The cerebellum – the cerebellum lies inferior to the cerebrum at the back of the head. It is mostly involved in coordination ofRead More Neuroscience Basics: Human Brain Anatomy and Lateralization of Brain Function, 3D Animation.
The pathway of blood flow through the heart. Oxygen-poor blood from your body returns to the right atrium of the heart. Blood from upper body returns through superior vena cava, blood from lower body returns through inferior vena cava. As the right atrium is filled with blood, it contracts, the tricuspid valve opens and bloodRead More The Pathway of Blood Flow Through the Heart Animated Tutorial.
If you have acute coronary syndrome, you have one or more conditions caused by a blockage of blood flow to your heart muscle. This is a medical emergency, because you may be having a heart attack, a condition in which your heart muscle begins to die. Your heart is a muscular organ that pumps bloodRead More Acute Coronary Syndrome and Heart Attack
The kidneys filter blood plasma, removing metabolic wastes, toxins from the body and excrete them in the form of urine. During this process, they also maintain constant volume and composition of the blood, or homeostasis. Blood enters the kidney via the renal artery, which divides to smaller arteries and finally arterioles. The arterioles get intoRead More Formation of Urine – Nephron Function, Animation.
the cardiac cycle refers to the sequence of events that occur and repeat with every heartbeat it can be divided into two major phases systole and diastole each of which subdivides into several smaller phases systole and diastole when not specified otherwise refer to ventricular contraction and relaxation respectively reminders blood flows from higher toRead More The Cardiac Cycle, Animation
An ectopic pregnancy is a pregnancy that occurs outside the uterus. Normally, fertilization takes place in the widest section of the fallopian tube. The fertilized egg then travels toward the uterus where it is to be implanted. Ectopic pregnancy happens when the egg gets stuck on its way and starts to develop inside the tube.Read More Ectopic Pregnancy, Animation