Mammalian heart, Biology

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.

Posted Date: 1/15/2013 11:29:51 PM | Location : United States







Related Discussions:- Mammalian heart, Assignment Help, Ask Question on Mammalian heart, Get Answer, Expert's Help, Mammalian heart Discussions

Write discussion on Mammalian heart
Your posts are moderated
Related Questions
The nominalists deny the existence of Plato's "types". For them only individuals exist. Species are man-made artificial abstractions. But naturalists, the biologists who have actua

Determine How Nutrition used to Prevent Dehydration? Maintaining optimal hydration status along with sufficient muscle glycogen stores delays the onset of fatigue and enables

Explain the term Kwashiorkor? The term Kwashiorkor means the 'disease the first child gets when the second baby is born', that is, 'the sickness of the deposed child'. Thus, th

Q. Describe Cluster analysis? After making a similarity table, it is then rearranged so that OTU's whose members have the highest mutual similarity are brought together. This c

TYPE S OF RIBOSOMES Ribosomes are of two types: - 1 . Procaryotic Ribosomes - 70 s = Occur in cytoplasm of prokaryotes, and also in mitochondria, and Chloroplast o

Q. Explain Culture Characteristics of Molds? The gross appearance of a mold growing on a food often is sufficient to indicate its class or order. Some molds are loose and fluff

TYPE S OF LYSOSOMES (1 )      Primary Lysosomes or storage granules or protolysosome - The primary lysosomes are smaller in size, they contain hydrolytic enzyme in the form

Approaches to Neuropsychological Assessment Probably the most useful model of neuropsychological interpretation is described in Reitan and Wolfson's (1993) four approaches to a

1. One of the greates challenges following the human genome project is to understand how genes are regulated and what functions they perform. a. Define the terms 'Transcriptomic

Assess Mobility of Prosthesis All implant-supported prostheses must be stable.  To detect mobility, place an explorer or scaler under the embrasures and apply gentle pressure i