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

Explain fixed-dose combination of tuberculosis, Fixed-Dose Combinations  ...

Fixed-Dose Combinations  A combination formulation of rifampin, isoniazid and pyrazinamide (Rifater) is approved by the FDA for the initial 2 months of daily anti-tuberculosis

Biological species concept, Q. Biological species concept? A biological...

Q. Biological species concept? A biological species as defined by Ernst Mayr are "groups of actually or potentially interbreeding natural populations which are reproductively

Parasitic protozoan, Parasitic Protozoan Out of the thousands of speci...

Parasitic Protozoan Out of the thousands of species of Protozoa, the majority are free living. However, many species from within the phyla Sarcomastigophora and Ciliophora are

Name the associated foods used in bacillus cereus, Name the Associated Food...

Name the Associated Foods used in bacillus cereus  Cereal dishes that contain corn and corn starch, mashed potatoes, vegetables, minced meat, liver sausage, milk, cooked meat.

What is biochemical characteristics, What is Biochemical Characteristics? ...

What is Biochemical Characteristics? In the last section we have learnt about the importance of biochemical tests. It must be clear now that biochemical tests are used to -

How many layers in retina, How many Layers in retina The retina is comp...

How many Layers in retina The retina is composed of  ten  layers: a:)  Pigmented epithelium (outermost layer), b)  Neusoepithelium, rods and cones  (photoreceptors), c

Care of psychoemotional aspects of patient in icu, Care of Psychoemotional ...

Care of Psychoemotional Aspects ICU area is an area which is cut off from outside world. Modem ICUs are built in such a way that the sensory deprivation is reduced. Ta

What is the physiological explanation for archaic method, In ancient Greece...

In ancient Greece the father of Medicine, Hypocrates, described a method of diagnosing diabetes mellitus by tasting the patient's urine. What is the physiological explanation for t

Avian tuberculosis, A v i a n tuberculosis Tuberculosis in poultry ...

A v i a n tuberculosis Tuberculosis in poultry has not remained a big threat in list of diseases due to commercialization of poultry business. It is a contagious chronic di

Explain nutrition assessment, Nutrition Assessment The nutritional care...

Nutrition Assessment The nutritional care process, you would realize, begins with nutritional assessment. Nutrition  assessment  is  the  evaluation  of  an individual's nutrit

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