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

What is esophagus called, What is the valve that separates the stomach from...

What is the valve that separates the stomach from the esophagus called? What is its function? The valve that separates the stomach from the esophagus is the cardia. It has the

Differences of transposable elements in e. coli, Discuss the similarities a...

Discuss the similarities and differences of transposable elements in E. coli, yeast, plants, and Drosophila.

Peacock, exoskeleton of peacock

exoskeleton of peacock

What is the difference between catabolism and anabolism, Q What is the diff...

Q What is the difference between catabolism and anabolism? Metabolism comprises two opposing processes: catabolism and anabolism. Anabolism is a set of synthesis reactions that

Determine about benefits of jogging, Determine about benefits of Jogging ...

Determine about benefits of Jogging Jogging gives a sense of wellness to a diabetic patient. The frequency of jogging should be at least 3 days in week with a distance of 2 km

Radiation cataract and steroid induced cataract of the eye, Explain the rad...

Explain the radiation cataract and steroid induced cataract of the eye. Radiation Cataract Exposure to radiation causes discoid posterior sub-capsular opacities. Mechanism o

Explain the work of linnaeus in animal taxonomy, Explain the work of Linnae...

Explain the work of Linnaeus in animal Taxonomy? In 18th century, the work of Linnaeus and his followers (Haartman, 1751, 1764, Kolreuter, 1761-66) helped systematic to advance

What functions regulates by hypothalamus, Q. What functions regulates by hy...

Q. What functions regulates by hypothalamus? HYPOTHALAMUS - Main visceral control center of the body (yet small in size). Central to virtually all homeostatic control . Th

Illustrate the functioning of comprehensive model, Illustrate the functioni...

Illustrate the functioning of comprehensive model 1) Provide continuity in understanding developmental progress, or lack thereof, in those disorders that affect neurological de

What is tubal pregnancy, What is tubal pregnancy? Many times fecundatio...

What is tubal pregnancy? Many times fecundation takes place in the Fallopian tubes. Usually the newly formed zygote is taken to the uterus where nidation and the embryonic deve

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