The smaller breeds of dogs tend to have their first estrus cycle at an earlier age, while the large and giant breeds of dogs may not come into heat for the first time until they reach eighteen months to two years of age.strus is the stage of the reproductive cycle in which the dog can become pregnant; sometimes a dog that is in estrus is said to be in heat or in season. On average, puberty or sexual maturity is reached at about 6 months of age, but this can vary by breed.
What is the function of the respiratory mucosa? As with all mucus in the body, its a lubricant to keep the lungs moist, prevents the lung lining from sticking to itself and prevents foreign body's like bacterium and dust fr â¦ om in bedding into the lungs causing infection.pecialized membrane that lines the air distrubution tubes in the respiratory tree. Over 125ml of mucus produced each day forms a mucous blanket over much of the respiratory â¦ mucosa. Mucus serves as an air purification mechanism by trapping inspired irritants such as dust and pollen etc.
The respiratory system is the group of tissues and organs in your body that enable you to breathe. This system includes your airways, your lungs and the blood vessels and muscles attached to them that work together so you can breathe.The respiratory system's primary function is to supply oxygen to all the parts of your body.It accomplishes this through breathing: inhaling oxygen-rich air and exhaling air filled with carbon dioxide, which is a waste gas.his is how the respiratory system works: First you breathe air in through your nose and mouth, which wet and warm the air so it won't irritate your lungs. Then the air travels through your voice box, down your windpipe and then though two bronchii (bronchial tubes) into your lungs.