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

Respiratory system of the phylum annelida characterized, Q. How is the resp...

Q. How is the respiratory system of beings of the phylum Annelida characterized? Respiration in annelids can be branchial or cutaneous. Cutaneous respiration takes place due to

Draw a section of the microscopic structure of human retina, Draw a section...

Draw a section of the microscopic structure of human retina and label any six parts in it. a)  Name the structure that determines the eye colour in humans. What is the normal f

Renal function & cardiovascular - change related with ageing, Define Renal ...

Define Renal Function & cardiovascular - change related with ageing? Changes associated with the cardiovascular and renal function: The progressive accumulation of athermanous

What are analogies for mitochondria, Explain What are analogies for mitocho...

Explain What are analogies for mitochondria? Ans) Well, as we know, the mitochondria are the producers of lots of a cell's energy and the nucleolus makes ribosome's.

Why epiphyseal closure differs between males and females, It is said during...

It is said during puberty rising sex hormones stimulate osteoblasts to produce bone faster than the rate at which epiphyseal cartilage expands. The timing of epiphyseal closure dif

Ecology, What is the concept of minimum and maximum way of tolerance

What is the concept of minimum and maximum way of tolerance

What is genomics , We are living in an unprecedented age of biological ...

We are living in an unprecedented age of biological discovery and the application of biological knowledge.   Programmed DNA sequencing delivered, in the year of  2001 over the 2.6

Explain the carbohydrates and fat requirements during sepsis, Explain the C...

Explain the Carbohydrates and Fat Requirements during Sepsis? Carbohydrates should constitute nearly 60% to 70% of the total energy. Glucose is the primary calorie substrate in

Clinical features - infective endocarditis, The clinical  manifestations of...

The clinical  manifestations of IE result from the local destructive effects of intracardiac infection; the embolization of bland or septic fragments of vegetations to

Explain potassium, Explain Potassium Potassium (K): Potassium restri...

Explain Potassium Potassium (K): Potassium restricted diets are important for patients with  advanced renal  failure undergoing  conservative  treatment or haemodialysis. Th

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