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

Define national programmes targeting infants and preschooler, Explain Natio...

Explain National Programmes Targeting Infants and Preschoolers? Infants and preschoolers are the vulnerable sections of the society. To give them due  coverage, some national p

What is uric acid , Uric acid is the main nitrogenous waste product o...

Uric acid is the main nitrogenous waste product of uricotelic organisms (birds, insects and reptiles), but is also established in ureotelic organisms from the breakdown of the puri

Explain adsorption - colloidal particle, Adsorption - Colloidal particle ...

Adsorption - Colloidal particle Colloidal particles attract and hold to their surfaces the molecules of various gases, vapors and other matter with which they come into contact

Integumentary system - glands, Glands - 1 .      SEBACEOUS GLAND - ...

Glands - 1 .      SEBACEOUS GLAND - Absent in palm and sole. Holocrine in nature. Branched, alveoli are present, sac like in appearance. Generally attached to fo

Contrast the reproduction of bacteria with that of frogs, Contrast the repr...

Contrast the reproduction of bacteria with that of frogs. Bacteria replicate asexually by splitting in two. Frogs reproduce sexually by producing sperm and eggs. One sperm and

How to make a 200 ml single solution, You have a 1M KCl stock solution and ...

You have a 1M KCl stock solution and a 85 mg/ml sulphuric acid stock solution. How will you make a 200 ml single solution containing 20mM KCl and 18 mg/ml sulphuric acid?

Explain the mandibular ramus, Mandibular Ramus Serves as an intraoral a...

Mandibular Ramus Serves as an intraoral autogenous bone donor site. Cortical bone upto 4mm thickness may be harvested from the ramus. Harvest of bone from this area requires kn

Sketch cis-trans isomer of the first molecule, Please help with the followi...

Please help with the following: a) Draw a diagram (showing all the C and H atoms, and their bonds) for a hydrocarbon with 5 carbons with a double bond between carbons 2 and 3.

Explain about the antioxidant activity of sugar, Explain about the Antioxid...

Explain about the Antioxidant Activity of Sugar? Several carbohydrates are tremendous scavengers for metal ions. Glucose, fructose and sugar alcohols (sorbitol and mannitol) ha

Food-borne clostridium, Food-borne Clostridium Clostridium botulinum a...

Food-borne Clostridium Clostridium botulinum and Cl. perfringens, the two members of the group have been implicated in food-borne illnesses. C. botulinum causes classical food

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