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GOD’S WORD FOR MAY 27 ~ ~ Jeremiah 8:7 ~ ~ “Even the stork in the heavens knows her appointed times; and the turtledove, the swift, and the swallow observe the time of their coming.”

Respiration in birds is much different than in mammals.

Birds have a larynx, but it is not used to make sounds. Instead, an organ termed the “syrinx” serves as the “voice box.”

Birds have lungs, but they also have air sacs. Depending upon the species, the bird has seven or nine air sacs.!!

Air sacs do not play a direct role in oxygen and carbon dioxide exchange, however they do keep oxygen rich air moving, in one direction, through the respiratory system. The air sacs of birds extend into the humerus (the bone between the shoulder and elbow which is hollow), the femur (the thigh bone, which is also hollow), the vertebrae and even the skull.

Birds do not have a diaphragm like most animals; instead, air is moved in and out of the respiratory system through pressure changes in the air sacs. Muscles in the chest cause the sternum to be pushed outward. This creates a negative pressure in the air sacs, causing air to enter the respiratory system. Expiration is not passive, but requires certain muscles to contract to increase the pressure on the air sacs and push the air out.

Bird lungs do not expand or contract like the lungs of mammals. In the lungs of mammals, the exchange of oxygen and carbon dioxide occurs in microscopic sacs in the lungs, called ‘alveoli.’

In the bird lung, the gas exchange occurs in the walls of microscopic tubules, called ‘air capillaries.’

The respiratory system of birds is more efficient than that of mammals, transferring more oxygen with each breath. This also means that toxins in the air are also transferred more efficiently. This is one of the reasons why fumes will kill a bird faster than another animal.

In years past, miners would bring a canary in a cage down into the mine with them to alert them when carbon monoxide levels were getting high. The bird would become weak while they still had time to hurry out into fresh air.

When comparing birds and mammals of similar weight, birds have a slower respiratory rate. Respiration in birds requires two respiratory cycles (inspiration, expiration, inspiration, expiration) to move the air through the entire respiratory system. In mammals, only one respiratory cycle is necessary. In flight, their respiratory rate will increase by at least ten times.

This is yet another example of God caring for every one of His creation. There is no limit to the variations and complications of His creation, be it animal, vegetable or mineral.

There is no room for the bird “evolving” from reptiles, especially when our verse for today was written thousands of years ago, and the names of the birds are the same as they are today.

Job 12:7-9 “But ask the animals and they will teach you, which of all these does not know that the hand of the Lord has done this.”

Romans 8:22 also reminds us that: “For we know that the whole creation groaneth and travaileth in pain together until now.”

All of creation was cursed because of sin. Animals, vegetation, soil, minerals—all were affected by the separation of mankind from Almighty God, and we all long for the resurrection of man and redemption of all created matter and enjoy fellowship with Our Lord Jesus Christ and the Trinity in heaven and the New, perfect earth!!! Come, Lord Jesus, Come!!!!

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