Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Lungs - Respiration
Lungs can be simple, characterised by air exchange with surrounding environment by diffusion only. These are called the diffusion lungs and are present in small animals such as pulmonate snails, small scorpions, sane spiders and some isopods. The other type - ventilation lungs are typical of vertebrates.
Figure: Breathing Cycle in Frogs
The air passes through a tube into inflatable lungs where gas exchange takes place and oxygen poor, carbon dioxide rich air is then forced out usually through the same tube. This is known as tidal flow of air. Ventilation of the lungs can take place in two different ways:
1) By using a pressure pump as in amphibians. Figure shows the process of ventilation in frog. The inflation of lungs depends on positive pressure bucco pharengeal pump. The nares remain open while glottis is closed (the air does not enters the lungs). The floor of the buccal cavity is raised and lowered periodically. At irregular intervals the glottis is open and nares are closed. The floor of the buccal cavity is raised forcing air into the lungs. As a result the frog can take in air several times without exhaling and blow itself up to considerable size. The glottis can close and while the air remains inside the lungs the cycle is replated in the buccal cavity.
2) By using a suction pump. Exhalation can be passive and inhalation is aided by muscle contraction or as in mammals, by contraction of muscular dome shaped diaphragm and external intercostal muscles lifting the ribcage. This decreases the pressure in the pleural space so causing the lungs to expand and air flows in.
Explain the term of measurement of height in veous pressure? Measurement of Height: Measurement of height of venous pressure is done from the sternal angle of Louis verticall
Cutaneous respiration in frogs and toads
Sodium-potassium pump A. The net flux of sodium is from a region of high sodium concentration to a region of low sodium concentration. B. The net flux of potassium is from a
Determine about the Chloroplast One of the most distinguishing features of all eukaryotic plant cells is that in addition to mitochondria, they contain special light harvesting
A group working at the University of California, Berkeley has developed "nanothermometers," little nanoparticles that can be injected into cells to measure the temperature in vario
Tikka Disease in Groundnut
Q. Show Acute Complications of Diabetes? Acute complications of diabetes include: Hypoglycemia or low blood sugar: The most frequent cause of low blood sugar is poor timing
What is Defective Colour Vision Defective colour vision is often called colour blindness. The ability to appreciate one or more of the primary colours is lacking. This can be e
Classify round worms with reasons
Procedure of radiographic template It is very similar to a flasking procedure. Mix slow setting irreversible hydrocolloid (alginate) with cold water (to gain more working ti
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd