Mammalian heart, Biology

Assignment Help:

Mammalian Heart

The division of heart and separation of systemic and pulmonary circulation is complete in birds and mammals. The structure of mammalian heart and also how the volume of fluid pumped by the heart is adjusted according to the oxygen needs of the body.

774_Mammalian Heart.png

                                                                Figure: Mammalian Heart

The mammalian heart is a muscular organ covered by a tough fibrous sheath the pericardium. It consists of four chambers. Each half consists of a thin walled atrium and a thick walled ventricle. There are two sets of valves. Atrioventricular valve separates the cavities of the atrium and ventricle and prevents backflow of blood. Semilunar valves are present where the pulmonary artery leaves the right ventricle and the aorta leaves the left ventricle, preventing backflow. The contraction of heart is called systole and the relaxation, diastole. A heartbeat consists of a rhythmic contraction and relaxation of the whole muscle mass. The heart rests only during the short interval between contractions.


Related Discussions:- Mammalian heart

Describe metabolic syndrome, Describe Metabolic Syndrome ? As discussed...

Describe Metabolic Syndrome ? As discussed, the risk factors like obesity, high blood pressure, high blood glucose or impaired glucose tolerance, and dyslipidaeinia are very im

Suppose that the substance does not ionize, Percent solutions are made on t...

Percent solutions are made on the basis of g/ml or ml/ml of diluent, and it is usually assumed that 1 ml of water = 1 g of water. For example, 20 g/100 ml of water or 200 g/1000 ml

Define drug effects on food intake - causes taste changes, Define drug effe...

Define drug effects on food intake - Causes Taste Changes? Several drugs can cause an alteration in taste sensation, reduced acuity of taste sensation or leave an unpleasant af

Late recurrence of artgirza--recurrence of angina, Late recurrence of a...

Late recurrence of artgirza: This is a reflection of progress of disease in the native coronary arteries distal to the grafts or narrowing or blockage of one or more of the g

Which elements contains carbohydrates, (a) Which elements contains Carbohyd...

(a) Which elements contains Carbohydrates (b) Which elements contains Proteins   a) Carbohydrates contain the elements carbon , hydrogen and oxygen. b) Protei

Determine the enzymatic analysis in foods, Enzymatic analysis in foods: app...

Enzymatic analysis in foods: applications in food industry Did you know that the degree of bacterial contamination of foods or freshness of food, particularly, meat etc. can be

Explain the check screw access holes for closure, Check Screws- Check screw...

Check Screws- Check screw access holes for closure. If screw access holes are uncovered, such as the bar-retained dentures, make sure that are free from debris. If screws can b

Is calcium-sensing receptors serves as a sensor, Which of the following ser...

Which of the following serves as a sensor, or as part of a sensor, that functions in a positive feedback system? A. CaSRs (Calcium-Sensing Receptors) situated in the plasma mem

Soil water-physical properties of soil, Soil Water Soil water relations...

Soil Water Soil water relationship is very important. In the fist place the supply of large quantities of water is necessary to satisfy the evapo-transpiration requirements of

What is hormones explain its role in humun body, What is Hormones explain i...

What is Hormones explain its role in humun body? Hormones are chemical signals that trigger responses in another part of the body. Once secreted, hormones move through the spa

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd