People often get confused about the exact location of the heart. You might have heard people saying “Is it on the left side?” or “Is the heart in the middle of my chest?” But these questions are of no surprise to us, as many people do not know the answer to this question. Th...
The human heart is about the size of a fist. (Image credit: Getty Images) The heart contains electrical "pacemaker" cells, which cause it to contract — producing a heartbeat. "Each cell has the ability to be the 'band leader' and [to] have everyone follow," Phillips said. In people...
One of the few breeds to have been exclusively bred in the US, the Boston Terrier has a heritage that dates back to the late 1800s. And while it’s no surprise that the first pup arrived in Boston Massachusetts, there are some contradictions about how this gorgeous breed came to be. Th...
The two largest veins in the body are the superior vena cava, which transports blood from the upper body to the right atrium of the heart, and the inferior vena cava, which transports blood from the lower body to the right atrium. Blood vessels have three layers. The tunica adventitia (ou...
The reason is testosterone, which is responsible for lengthening ring fingers and protects against heart disease. The term pacemaker doesn’t just refer to an implanted device. The pacemaker cells in the right atrium of a healthy heart control the heart rate. An implanted pacemaker relies on ...
Heart Blocks - Learn about the causes, symptoms, diagnosis & treatment from the Merck Manuals - Medical Consumer Version.
A healthy adult heart beats about 60-80 times per minute. Children’s heartbeats are faster, around 100-120 bpm. The heart has four chambers to pump blood: Deoxygenated blood enters the right atrium, then into the right ventricle where it goes to the lungs. Once oxygenated, it enters the...
The amphibian heartconsists of the right and left atria and a single ventricle, and ithas a double pump. The blood from the body comes in through the right atrium, and that of the lungs comes from the left atrium, the blood then is pumped into the ventricle, where it mixes and is ...
The amphibianheart consists of the right andleft atria and a single ventricle, and it has a double pump. The blood from the body comes in through theright atrium, and that of the lungs comes from the left atrium, the blood thenis pumped into the ventricle, where it mixes and is ...
These are ready-to-use worksheets that are perfect for teaching about the Heart which is the central organ of the circulatory system. Complete List of Included Worksheets Below is a list of all the worksheets included in this document. Heart Fact File Searching For Words Name It, The Heart ...