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

Define consistency and texture - dysphilgia, Define Consistency and Texture...

Define Consistency and Texture - Dysphilgia? Aspiration of liquids, including water, into the lungs can result in complications. To avoid this problem and yet fulfilling the fl

What percentage of the father''s body was covered by burns, The Jones famil...

The Jones family was caught in a fire but escaped. Unfortunately the father and daughter suffered burns. The father had second degree burns on his chest, abdomen, and both arms, an

Biologists established that new cells, Biologists established that new cell...

Biologists established that new cells Consequent to this doctrine, biologists established that new cells are formed by cell division and by the end of the nineteenth century, t

What are some examples of biological activities, Q. What are some examples ...

Q. What are some examples of biological activities in which osmosis plays an significant role? Hemolysis destruction of red blood cells by entrance of water, the hydric regulat

What are flagella and cilia, Q. What are flagella and cilia and how do thes...

Q. What are flagella and cilia and how do these structures acquire movement? What are some examples of flagellated and ciliated cells in humans? Flagella and Cilia are structur

Can you explain pus, Q. What is pus? Pus is a residual of the inflammat...

Q. What is pus? Pus is a residual of the inflammatory reaction and it contains a mixture of fragments of dead infectious agents (generally bacteria), leukocytes and tissues.

Explain galactose metabolism, Galactose Metabolism Galactose  goes to t...

Galactose Metabolism Galactose  goes to the liver via portal blood and is phosphorylated by galactokinase togalactose-  1  -phosphate (GIP) using ATP as  a phosphate donor as s

Ruminal tympany (bloat), R uminal tympany (Bloat) It is the over-diste...

R uminal tympany (Bloat) It is the over-distension of the rumen with gases which may be either frothy or free gas. The disease is characterized by change in silhouette of the

Biocontrol agents , Use of micro-organisms to control insect pests, pathog...

Use of micro-organisms to control insect pests, pathogens or weeds constitutes biological control, and the biological agents employed are called biocontrol agents. Micro-organis

What is rhizopus - fungi, What is Rhizopus - Fungi? Rhizopus is a commo...

What is Rhizopus - Fungi? Rhizopus is a common laboratory contaminant. It is a spoiling mould and found frequently on the surface of bread, fruits and vegetables. It can grow a

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