1. Describe the coverings of the heart and the layers of the heart wall. Which membrane...

1. Describe the coverings of the heart and the layers of the heart wall. Which membrane is

both a covering and part of the heart wall?

2. What causes the first and second heart sounds?

Solutions

Expert Solution

Answer

1) Coverings and layers of the heart wall

Pericardium is the outer covering of the heart.

There are two type of pericardium :

a) Fibrous pericardium : The outermost covering of heart is fibrous pericardium that protects the heart and it also helps in keeping the heart in position.

b) Serous pericardium : It further consist of two layers : Parietal and Visceral

Parietal pericardium : It lines internal surface of fibrous pericardium
Visceral pericardium : It directly attaches to the wall of heart.
There is a cavity between parietal and visceral pericardium known as pericardial cavity. It contains pericardial fluid.

Layers of heart wall

a) Epicardium : Visceral pericardium is also known as epicardium. It is outer layer of heart wall.

b) Myocardium : It is the middle layer of heart wall consist cardiac muscle tissue responsible for contraction of the heart.

c) Endocardium : It is the innermost layer of the heart wall. It protects heart valves and chambers of the heart.

The membrane that is both a covering and part of the heart wall is : Visceral pericardium / Epicardium

2) Heart sounds

First heart sound (S1) : It occurs due to turbulence created by closure of atrioventricular valves (mitral and tricuspid). It is also called "Lubb" sound.

Second heart sound (S2) : It occurs due to turbulence created by closure of semilunar valves (aortic and pulmonary). It is also called "Dubb" sound.

Sydney Mullin answered 1 year ago

Next > < Previous

Related Solutions

1) What are the three layers of the heart? Briefly describe the three layers of the...

1) What are the three layers of the heart? Briefly describe the three layers of the heart. 2) Describe the pathway of blood from the heart to the lungs (Pulmonary Circulation) and from the heart to the different bodily tissues (Systemic Circulation) and back to the heart a. You must include all the chambers of the heart (Atria and Ventricles), all the valves (ex. Tricuspid Valve, etc.), and all the necessary vessels (ex. Pulmonary Artery, Inferior Vena cava, etc.)

1. The surface of the heart has three layers of membranes to anchor the heart in...

1. The surface of the heart has three layers of membranes to anchor the heart in its place and for lubrication purposes. What is the name of the 2 layers that secret serous fluid for lubrication purpose? 2. Using the skeleton as the reference points, where is the cardiac apex (Left or right of the sternum? Which intercostal space?)

describe the function of the serous membrane. the layers and what they line or cover. what...

describe the function of the serous membrane. the layers and what they line or cover. what are the types of serous membranes .what does each of these of these cover/

Q2. Describe the basic four layers of the wall of the digestive tract. Be sure to...

Q2. Describe the basic four layers of the wall of the digestive tract. Be sure to include tissue types found there and the function of the layer. Mucosa – Absorption and secretion Epithelium Lamina Propria Muscularis mucosae Submucosa – Supports mucosa Muscularis Externa – Motility that propels food and residual through the digestive tract Inner circular layer Outer longitudinal layer Serosa – Secretion of fluid that reduces the friction from the muscle movement Areolar tissue Mesothelium Q3. Though that basic...

Describe the smooth muscle layers in the wall of the esophagus, stomach, small intestine & large...

Describe the smooth muscle layers in the wall of the esophagus, stomach, small intestine & large intestine; include the number of layers and layer arrangement & how this is functionally important

1. Briefly discuss the layers, chambers, valves, vasculature, and the conduction system of the heart.

"Describe the layers, the way the layers fit together, and the repetition of layers in hexagonal...

"Describe the layers, the way the layers fit together, and the repetition of layers in hexagonal close packed versus cubic close packed. Make sure to answer ALL parts of the question." I have no idea what type of description they are looking for or terms I should use, I would greatly appreciate an answer!

Describe the basic structure and components of a prokaryotic cell including the cell wall, membrane, nuclear...

Describe the basic structure and components of a prokaryotic cell including the cell wall, membrane, nuclear area, ribosomes, types of inclusions and endospores. How do the cell walls of Mycoplasma, the Archaea and Mycobacterium differ from the cell walls of most other bacteria? What characteristics are used to group viruses into taxonomic families? What is a viral species? What are the suffixes that are used to represent genus, family and order names for viruses?

1.Describe the differences, if any, between laminar and turbulent boundary layers. 2.Describe the different sub-layers required...

1.Describe the differences, if any, between laminar and turbulent boundary layers. 2.Describe the different sub-layers required to model turbulent boundary layers. 3.Discuss the reason(s) for a similar pattern between wall shear stress and heat transfer coefficient profiles. 4.Describe the reason(s) why both turbulent momentum and thermal boundary layers approaching each other. 5.Describe the reason(s) why the unsteady governing equation terms must be kept when dealing with turbulence

Briefly describe the function of each of the organelles listed below cell wall: plasma membrane: nucleus:...

Briefly describe the function of each of the organelles listed below cell wall: plasma membrane: nucleus: nucleolus: ribosomes: endoplasmic reticulum (smooth and rough): Golgi apparatus: Peroxisomes: Mitochondria: Chloroplasts: large central vacuole: lysosomes: extra cellular matrix:

Subjects