<u>The heart is a cone-shaped muscular organ located within the mediastinum of the thorax.</u>
The mediastinum is the space lined with membranous tissue between the lungs. The mediastinum contains not only the heart but also the great vessels (pulmonary artery, aorta, pulmonary veins, and the superior and inferior vena cava), as well as parts of the esophagus and the trachea.
<span><u>Its apex rests on the </u><u>diaphragm</u><u> and its superior margin lies at the level of the </u><u>2nd</u><u> rib.</u>
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The apex of the heart is the conical area created by the confluence of the ventricles, but mainly by the left ventricle. It rests on the diaphragm. The superior margin of the heart, also known as the base, lies at the level of the second rib.
<span><u>Approximately two-thirds of the heart mass is seen to the left of the </u><u>midsternal border</u><span><u>.</u>
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This is because to the left of the midsternal border lies the left ventricle which comprises most of the heart mass as the left ventricle is the one responsible for pumping blood throughout the systemic circulation and significant pressure should be overcame; resulting to the physiologic hypertrophy of the left ventricle.
</span><span><u>The heart is enclosed in a serosal sac called the </u><u>pericardium</u><u>. The loosely fitting double outer layer consists of the outermost fibrous pericardium, lined by the parietal layer of the serous pericardium.</u></span>
The pericardium is one of three layers of the heart (other ones being the myocardium and the endocardium); and is the outer layer of the heart. The pericardium is composed of two tissues, the fibrous pericardium and the serous pericardium. The pericardium functions to lubricate the movement of the heart by the action of the pericardial fluid.
<span><u>The heart has </u><u>four</u><u> chambers. R</u></span><span><u>elative to the roles of these chambers, the </u><u>atria </u><u>are the receiving chambers, </u></span><span><u>whereas the </u><u>ventricles </u><u>are the discharging chambers.</u>
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The four chambers of the heart are namely the right atrium, right ventricle, left atrium, and the left ventricle. Venous blood goes to the right atrium via the vena cavas then to the right ventricle via the tricuspid valve; then to the pulmonary circulation via the pulmonary artery where it will be oxygenated. From the pulmonary circulation, the left atrium will receive the oxygenated blood via the pulmonary veins then to the left ventricle via the mitral valve where it will be pumped to the systemic circulation via the aorta.
The First 20 Elements and The Difference Between Elements, Compounds and Mixtures. Standard. 1 – H – Hydrogen – Odorless, Colorless and Flammable Gas. 2 – He – Helium – Colorless and Odorless. 3 – Li – Lithium – Low Melting Point and Low Density. 4 – Be – Beryllium – High Thermal Conductivity and Non Magnetic.
Protein kinase a, which stimulates glycogen degradation, is activated directly bym cyclic AMP.
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What is glycogen?</h3>
- Animals, fungi, and bacteria all use the multibranched polysaccharide of glucose known as glycogen to store energy.
- The primary form of glucose storage in the body is represented by the polysaccharide structure.
- Our cells primarily use glucose as fuel.
- The liver and muscles store the glucose when the body doesn't need to use it for energy.
- Glycogen is the name given to this form of glucose that is stored and is composed of several linked glucose molecules.
- Although only liver glycogen directly contributes to the release of glucose into the circulation, maintaining a healthy blood glucose concentration is one of glycogen's key functions.
- The body uses glycogen as a major energy reserve.
- For instance, liver glycogen controls homeostasis and blood sugar levels.
- On the other hand, muscle glycogen aids in physical exercise by allowing skeletal muscles to contract.
Learn more about glycogen here:
brainly.com/question/4303062
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Ethyl alcohol is one of the series of organic chemical compounds
in which a Hydrogen (H) attached to carbon is replaced by a hydroxyl (OH). It
is made from sugar, starch and other carbohydrates by fermentation with yeast
and synthetically from ethylene or acetylene. It has been used in beverages
which has unstable, combustible, colorless liquid with slight distinctive odor.
The amount of Ethyl alcohol in any drinks can be determined by multiplying the
percentage (%) of alcohol and size.
Answer:
Glycolosis has a net gain of 2 atp
Explanation:
It produces 4 but you invest 2 to start so its only net gain of 2
You also ge 2 pyruvate and 2 NADH
