What is the role of heart in human body, Biology

Assignment Help:

What is the role of heart in human body?

The heart is the main pump that circulates the blood and fluid within the body. The heart, beats at 72 times per minute, and pumps about 5.5 liters of blood per minute in the average adult. The heart of a young athlete can reach 180 or more beats per minute and can pump over 17 liters of blood per minute.

The human heart has four chambers. The upper chambers receive blood and are called atria (singular atrium; sometimes also called auricles). The lower chambers, or ventricles, pump blood to the lungs and throughout the body. Flaps of tissue called atrioventricular valves prevent blood from flowing back into the atria when the ventricles contract. The atrioventricular or a-v valve, on the right side of the body, leading from the right atrium to the right ventricle, is the tricuspid valve. The one leading from the left atrium to the left ventricle is the bicuspid valve, also called the mitral valve.

The heart consists of two separate pumping systems, the right side for the pulmonary circulation to the lungs, and the left side for systemic circulation to the rest of the body. The heart muscle tissues are supplied with oxygen and nutrients by their own circulatory system. Two arteries, called the coronary arteries, branch from the aorta, the main artery of the heart, just beyond the semilunar valves. These break up into arterioles and capillaries that supply the heart muscles and heart valves. Blood from the capillaries is collected in veins leading into a large vein called the coronary sinus, which directly enters the right atrium.

 

 


Related Discussions:- What is the role of heart in human body

Determine the parts consists in our urinary system, Determine the parts con...

Determine the parts consists in Our urinary system Our urinary system consists of following:  Two kidneys  Two ureters  One urinary bladder  One urethra Apart fr

Are there chloroplasts in cyanobacteria, Are there chloroplasts in cyanobac...

Are there chloroplasts in cyanobacteria? In cyanobacteria there are no chloroplasts and the chlorophyll layers are dispersed in cytosol. Which chemical element is central in

Role of psychiatric nurse, ROLE OF PSYCHIATRIC NURSE: In Blocks 2 and ...

ROLE OF PSYCHIATRIC NURSE: In Blocks 2 and 3 you have learnt about various therapeutic interventions  for mental disorders  like anxiety neurotic disorders, psychotic disorder

Substrate-level phosphorylation, There are two distinct methods through tha...

There are two distinct methods through that cells synthesize ATP.  In  oxidative phosphorylation which containing  the electron transport  chain and the generation  of ATP is linke

Explain repressors , Gene repressor proteins which inhibit the trans...

Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region nea

Plant nutrition, what is usually regarded as evidence that photosynthesis h...

what is usually regarded as evidence that photosynthesis has occurred in a plant?

Explain cephalization in nematodes and platyhelminthes, How is the nervous ...

How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes? Annel

Define distant osteogenesis, Q. Define Distant Osteogenesis? Distant Os...

Q. Define Distant Osteogenesis? Distant Osteogenesis : This type of healing has also been described to explain the phenomenon of "Osseointegration" of machined metallic implant

Counselling for day to day management, Q. Counselling for day to day Manage...

Q. Counselling for day to day Management? As we know that diabetes is a chronic disease, a major part of its control requires counselling the patient and his family for day to

Water absorption in digestive system of mammals and bird, Q. Compared to ma...

Q. Compared to mammals do birds absorb more or less water in their digestive system? Why is this phenomenon an adaptation to flight? Bird feces are more liquid than mammal a fe

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