Internal and external respiration, Biology

Assignment Help:

External Respiration:

Diffusion of oxygen into blood and carbon dioxide into alveoli (external respiration)  is the diffusion of oxygen from air in  the alveoli of lungs to blood  in the pulmonary capillaries and diffusion of carbon dioxide in  the opposite direction.

Transport of Oxygen and Carbon Dioxide:

Transport of oxygen and carbon dioxide in the blood and body fluids to and from the cells. 98.5 per cent oxygen bound  to haemoglobin in  the RBC and  1.5 per  cent of oxygen dissolved in the blood plasma  is transported  to the body cells.
Whereas carbon dioxide from the tissues is diffused  into the b1,ood and transported to the  lungs in  the form of bicarbonate ions (78 per cent), as carbamino compounds (13 per cent) and a small percentage  (9 per oent) dissolved in blood plasma. From the  lungs carbon dioxide is removed in  the exhalation. 

Internal Respiration

This occurs in  tissues throughout the body the exchange of oxygen and carbon dioxide between the  systemic capillaries and tissue cells  is called the  internal respiration. Partial pressure of oxygen (PO2)  in the systemic capillaries is higher (100 mtnHg) than the PO2  in tissues cells in  the tissue cells (40 mmHg) at rest. Due to the pressure difference, oxygen diffises out of the capillaries into the tissue cells and blood PO2  drops to 40 rnm Hg. Tissues are constantly using oxygen and producing carbon dioxide. Partial Pressure of  carbon dioxide (PCO2) of cells is higher  (45 mrnHg) than that of systemic capillary blood  (40 mmHg). As a result carbon dioxide diffise  fiom tissue cells into the systemic capillaries until the PCO2  increases to 45 mm Hg.


Related Discussions:- Internal and external respiration

Infectious coryza, I nfectious coryza A highly infectious bacterial di...

I nfectious coryza A highly infectious bacterial disease of chickens caused by Hemop hilus paragallinarum, is characterized by catarrhal inflammation of the upper respirator

Rheumatic fever, Rheumatic fever is an immunologically mediated connective ...

Rheumatic fever is an immunologically mediated connective tissue disorder following throat infection with group-A streptococci (GAS). It is characterised by an inflammatory proces

What is the axes of fick, What is the Axes of Fick The Axes of Fick sho...

What is the Axes of Fick The Axes of Fick show that any eye position can be specified as the amount of rotation around a set of axes fixed in the orbit: 1) Vertical Axis: Z-

Solid or liquid at room temperature, do fats with one or more 'kinky' tail ...

do fats with one or more 'kinky' tail fatty acids tend to be solid or liquid at room temperature? These are found in triglycerides forming what? Solid fats or oils? Is it opposite

Explain in brief about life style modification, Explain in brief about Life...

Explain in brief about Life style modification Life style modification in simpler words, means  diet control and doing exercises. Diet control and exercise should be planned on

Show the process of synaptic transmission, Q. Fluoxetine is an antidepressa...

Q. Fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission. What is that mechanism? Fluoxetine is a substance that inhibits

Embryo - pollen biology, Embryo - Pollen Biology The suspensor cells o...

Embryo - Pollen Biology The suspensor cells of young embryos of Tropaeolum majus show that the activity of acid phosphatase increases from micropylar to chalazal pole. The con

Zoology of Protozoa, How does the metachronal waves form in the ciliary row...

How does the metachronal waves form in the ciliary row of protozoa ? Explain the cilia beating mechanism associates with it.

Define low water permeability across the luminal membranes, A healthy perso...

A healthy person is on a diet that having of very small amounts of water. A. This person will make a large volume of dilute urine with low amounts of dissolved solutes. B. T

What is intracellular digestion, Intracellular digestion, or cellular diges...

Intracellular digestion, or cellular digestion, is the breaking in the interior of the cell of big molecules coming from outside or even from the own cell metabolism into smaller m

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