What are the structures of birds that are conducive to flight, and what are the morphological and st

1. The body is streamlined, reducing flight resistance. 2. The forelimbs become forewings.

Able to fly. 3. Some bones are very thin, some are healed together (the keel process of the bird's chest is an example), and the longer bones are mostly hollow. 4. Double breathing improves the efficiency of ventilation and provides sufficient oxygen (unique to birds).

5. The rectum is very short, which is conducive to defecation and reduces its own weight (which is also the reason why bird poop will fall from the sky). 6. The whole body is covered with feathers.

1.The bones are hollow.

2.The whole body is covered with feathers, the flight feathers are used for flight, the down feathers are insulated, and it helps the bird to be streamlined, reducing wind resistance3The sternum has a keel process, and the pectoral muscles are well developed.

4.It has a special Zheng Pai respiratory system, and with the help of air bags, it can ensure that the lungs complete two gas exchanges with one inhalation.

5.Without direct discharge of rectum and bladder, urine and digestive tract excretion contribute to weight loss6The construction of the wings.

7.Some birds have special navigational limb mechanisms, such as pigeons that can sense the Earth's magnetic field. ,4,

The structural features of birds are always adapted to their lives, such as the forelimbs become wings, with large regular feathers, arranged in a fan shape, suitable for flight; The body is streamlined, which can reduce drag when flying; There are air sacs in the body to assist the lungs to complete double breathing and can supply sufficient oxygen; Some bones are hollow, some bones are healed, and the rectum is very short, which can reduce weight; The pectoral muscles are well developed, which is conducive to pulling the wings to complete the flight maneuver Large appetite and strong digestion ability, which can provide sufficient nutrients for the flight

Therefore, the answer is: in appearance: the body is streamlined, the body surface is feathered, and the forelimbs are winged.

Sports: the pectoral muscles are well developed, there are keel protrusions, and the long bones are mostly hollow, light, thin but strong.

Digestion: large amount of food, strong digestion ability, can provide sufficient energy; The rectum is short, and the stool can be passed in a timely manner.

Respiratory: There are well-developed air sacs, double breathing, and strong oxygen supply capacity.

Circulatory: The heart has four chambers, two circulatory routes, and the heart beats fast.

1. The body of birds is streamlined, the body surface is covered with feathers, the forelimbs become wings, the bones are light, thin and strong, the chest muscles are developed, and there are air sacs to assist lung breathing.

2. The bones are light in weight and hard in texture, with a towering keel protrusion on the chest, and there is a gas-filled cavity in the middle of the bone.

3. The chest is muscular, and the back muscles are degenerate, which is conducive to pulling the wings.

4. The nervous system and sensory organs are very developed. The heart has four chambers, the number of beats is fast, and the circulatory system is perfect.

5. There are well-developed air sacs, which can not only reduce weight but also form a unique double breathing with the lungs to meet the needs of oxygen and energy consumption when birds fly.

6. Birds have a perfect dual circulation system, and oxygen-rich blood is completely separated from hypoxic blood to ensure the demand for oxygen for flight.

7. Large amount of food and fast digestion. The rectum is short and thick, and feces cannot be stored, so frequent bowel movements, the bladder of birds disappears, and urine is excreted with feces, which is conducive to reducing the burden during flight.

8. In short, birds are a class of animals with feathers on the body surface, forelimbs specialized into wings, the ability to fly quickly, air sacs inside, and high and constant body temperature.

The morphological and structural characteristics of birds suitable for flight, body shape: streamlined, which can reduce the resistance of the air during flight. Feathers:

The feathers of the whole body of the domestic pigeon are mainly two kinds of feathers and down feathers, the main feathers are composed of feathers and feathers, covering the surface of the body, and the largest feathers are born on the wings and tail, mainly used for flight; Wings: The forelimbs become wings, the wings are fan-shaped, and there are several rows of large feathers, and the wings are the flight organs of the domestic pigeon. muscles and bones; Digestion:

Birds eat a lot of food and this is because birds need to expend a lot of energy during flight.

No way, it's still online, whether you look at the wings of birds that follow you or not is the first condition for them to have flying skills. Under the same conditions of having wings, some birds can fly very high, very quickly, very far; Some birds can only hover, glide, or even fly at all. It can be seen that just wings have a lot of knowledge.

The structure of a bird's wings is no less complex than the bird itself. If the feathers of the bird's wings are constructed, the principle of aerodynamics can be skillfully applied, and when they are fanning up and down or pressing up and down, they can push the air and fly forward using the principle of reaction; The structure of the feathers is reasonable, which can effectively reduce the air resistance encountered during flight, and some can also play a role in de-trembling and noise reduction. There are great differences in the wings of various species of birds, so that the difference in wings alone creates many excellent and average "pilots".

Some of the country's second-class protected animals have males weighing more than 14 kilograms, with a body length of 120 centimeters and a wingspan length of 240 centimeters.

For another example, the ** bird with a wingspan of meters, which usually flies at sea 160 kilometers off the coast, is a first-class protected animal in China.

After reading the previous content, some people may ask, can you fly just by wings? No, it's the special bones that send birds to the skies. Bird bones are excellent "lightweight materials", hollow and lightweight.

According to the analysis, the bird bone accounts for only 5 6 of the bird's body weight; Human bones account for 18 of body weight. Due to the light bones, the wings are very easy to drive, and there are many air sacs connected to the lungs in the bird's body, which is very beneficial for weight loss and buoyancy.

These favorable conditions undoubtedly give the birds the ability to fly, allowing them to perform their skills in another living space. However, I think there may be other reasons why birds can fly into the blue sky, but humans have not discovered it until now.

From the understanding of the abilities of birds, we can see that exploring the abilities of birds will help humanity to open up new territories.

1.The body shape is streamlined, reducing resistance.

2.**Thin and loose, the body surface is covered with feathers, and the forelimbs are turned into wings.

3.The bones are thin, light, and firm, and the recommended vertebrae are healed, and there is a keel process.

4.The pectoral muscles are well developed, the tendons are long, and the muscles and abdomen are concentrated.

5.Toothless, does not store feces, weight loss.

6.Complete double circulation, large heart, fast heartbeat, high blood pressure, fast blood flow and vigorous metabolism7Double breathing, with air sacs and a well-developed tracheal system.

8.The metabolite is urea, there is no bladder, no urine is stored, weight loss is 9The midbrain (optic lobe) is well developed and the cerebellum is well developed.

10.The vision is well developed, with transient membrane, scleral bone, and dual regulation.

11.The right ovary degenerates, and weight is lost.