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 starch gelatinisation, Starch Gelatinisation Starch is insolubl...

Starch Gelatinisation Starch is insoluble in cold water but in warm water it swells until its gelatinization temperature begins to lose its structure and leaches out its  8con

What are prophylactic measures against hiv infection, Q. What are some prop...

Q. What are some prophylactic measures against HIV infection? The major prophylactic measures against HIV infection are: the use of condoms in sexual relations, not to share ne

Determine the food sources of vitamin a, Determine the Food Sources of Vita...

Determine the Food Sources of Vitamin A? Vitamin A or retinol performed vitamin A), as you may already know, is found only in foods of animal origin, such as milk, cheese, crea

Discuss in brief about headaches, Discuss in brief about the Headaches ...

Discuss in brief about the Headaches Headache is so common among the general population that rare indeed is the person who has never suffered one. Headache may constitute a neu

How does sexual reproduction take place in bacteria, Q. How does sexual rep...

Q. How does sexual reproduction take place in bacteria? How dissimilar are the modalities of bacterial sexual reproduction? Sexual reproduction occurs when bacteria incorporate

Determine in brief about the mse, Determine in brief about the MSE The ...

Determine in brief about the MSE The MSE deals with questions concerning the addressee's Consciousness, Emotional State, Thought Content and Clarity, Memory, Sensory Perception

Explain the root-end preparation - endodontic surgery, Explain the Root-End...

Explain the Root-End Preparation - endodontic surgery a. Class I type preparation, 3mm depth. b. Tips are designed in a length of 3 mm to prevent procedural errors. c. Ul

What is the cell division process, What is the cell division process direct...

What is the cell division process directly related to the embryonic growth? The embryonic growth depends directly on mitosis. By this type of cell division the zygote separates

Nutritional factor that contribute to the malnutrition - chd, Define Nutrit...

Define Nutritional and metabolic factors that contribute to the malnutrition of CHD? Nutritional and metabolic factors that contribute to the malnutrition of CHD infant are ele

How will privacy and confidentiality of clinical data, Question 1: What...

Question 1: What are the requirements you need to satisfy for internet usage and remote data capture under 21 CFR parts 11 in a clinical trial? Define 21 CFR parts Me

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