Answered: Name the coverings of the heart.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Related questions

Question

Name the coverings of the heart.

Expert Solution

Step 1

The heart is a muscular organ in most animals that pumps blood through the circulatory system's blood vessels. Blood pumps oxygen and nutrients into the body, as well as metabolic waste like carbon dioxide, to the lungs. Human hearts are about the size of a closed fist and are found in the center of the chest, between the lungs. The heart is divided into four chambers in humans, other mammals, and birds: the top left and right atria, as well as the bottom left and right ventricles.

Step 2

A two-layer membrane called the pericardium surrounds your heart like a sack. The outer layer of the pericardium surrounds the roots of your heart's blood vessels and attaches lines to your spinal column, diaphragm, and other parts of your body. The pericardium is a sac with two walls that surrounds the heart.
The fibrous pericardium is a tough connective tissue that protects the heart, links it to its surroundings, and prevents it from overfilling. It is located on the outside of the sac. The fibrous pericardium is a layer of connective tissue that provides support and protection of the heart. It has a number of attachments to the diaphragm, sternum (with sterno-pericardial lines), and a vertebral column. It holds the heart in place.
The serous pericardium is a two-layer membrane that is thin and slippery. The main arteries that leave the heart are connected to this membrane. Serous pericardium is a layer of serosa comprising the fibrous pericardium (parietal layer), which is located at the roots of the major arteries covering the entire heart area (visceral layer).
The pericardial cavity is one layer deep. This hollow provides a friction-free environment for the heart to function properly. The pericardial cavity is a potential site between two layers of serous pericardium surrounding the heart. Usually, it contains a small amount of serous fluid that works to reduce local irritation and lubrication. Thus, the cavity facilitates free movement of the heart.