How Do Cockroaches Breathe?
The respiratory system in insects differs from that of humans. Here, we will learn about the respiration in cockroach which is a black or brown colored insect and live in damp places. It is omnivorous and feeds on small insects, food grains, cereals, another plant, and animal products; so, they consume any organic matter.
What Type of Respiration Do Cockroaches Have?
Their respiratory system is interesting and different, the respiratory organ of cockroaches is a tracheal system. The trachea is a tubular structure also known as windpipe helping to conduct the air. It takes oxygen from the air in the surroundings; insects including cockroaches have a network of tracheal tubes connected with each other and this is termed as the tracheal system.
How Does a Network of Trachea Work?
There are different parts of the tracheal system that work together for respiration in cockroaches, explained as follows-
These are small holes present on the lateral surface of the main body. These are open to the air and present as openings just like nostrils in humans. So, the air is taken in with the help of spiracles that travels through the tracheal tube. The opening of spiracles is regulated by muscular sphincters. When sphincters open, air comes in and when they close, air does not enter the holes.
These are tube-like structures that open through spiracles and this part carries oxygen from the air (received from spiracles) to other body parts.
These are subdivided parts from the trachea that appear thinner tube-like structures. Tracheoles have a network of fluid (hemolymph) and these are the sites where gaseous exchange takes place by the process of diffusion.
The concept of the respiratory system of a cockroach is similar to that of human beings in a way that spiracles act as nostrils, the trachea is common in both and tracheoles act as bronchioles and alveoli in humans.
Respiration in Earthworm
Earthworms are slimy creatures and are segmented in appearance; these are found in soil and help in maintaining soil fertility. They rely on the live and decayed organic matter under the soil. Respiration in earthworms is through the skin.
How Do Earthworms Breathe?
Learning about earthworms, they perform the process of respiration with the help of thin permeable skin. Oxygen will not move directly through the skin, it mixes with the moist slime first before entering the skin. Therefore, it is necessary for earthworms to have moist skin to prevent suffocation. Under the surface of the skin, there are blood capillaries where also the mixture of slime and air reaches. Besides skin and capillary, there are blood vessels in earthworms and the dorsal blood vessels take the oxygen to the head region (anterior region) whereas the ventral blood vessels take it to the posterior region. This way, oxygen is circulated throughout the body.
How Do Earthworms Respire and Perform Exhalation?
Earthworm respiratory system is not one-sided; Now, it’s time to know about how carbon dioxide or the waste gases coming out of the earthworm’s body. As we know, the body of an earthworm is divided into a number of segments, and segmentation is performed by numerous septa. There are nephridia present in the segments of earthworm’s body that help in exhalation.
What is the Respiratory Organ for Earthworms?
Earthworms have no specialized organs for respiration. However, all segments of the body possess nephridia except the first three anterior segments and the last posterior segment. Nephridia are coiled tubular duct-like organs in earthworms to filter and remove waste from their bodies. They consist of openings that are extended till the skin and each segment can throw out waste gases through these openings present in the skin of earthworms.