Why can people keep water in their bodies from evaporating without an exoskeleton?

People don't have external google, but they can keep water from evaporating, that's because our ** has solder wires, it plays a role in protecting the water in our body from evaporation, and it can also ensure that it is us. Normal perspiration. Khan, now our ** organization is our second line of defense.

Test Points: Terrestrial Animals and Their Adaptation to the Environment Arthropods Main Characteristics of Locusts Special Topic: Analysis:

1) The characteristics of terrestrial animals suitable for terrestrial animals: (1) The terrestrial climate is relatively dry, and in line with this, terrestrial animals generally have structures to prevent water dispersion and loss (2) Terrestrial animals are not affected by the buoyancy of water, and generally have organs that support the body and movement, and are used for crawling, walking, jumping, running, climbing and other locomotion modes in order to forage and avoid enemies (3) In addition to earthworms and other animals, terrestrial animals generally have various respiratory organs that can breathe in the air and are located inside the body (4) Land animals also generally have well-developed sensory organs and nervous systems, which can respond to the changing environment in a timely manner (2) Locusts have a hard exoskeleton on the surface of their bodies, which can protect and support the soft organs inside and prevent the evaporation of water in the body Centipedes have a tough exoskeleton on the surface of the body, which can prevent the evaporation of water in the body and adapt the locusts to dry land life; Locusts breathe with trachea and fly with wings, locusts do not** So selected: c Comments:

The key to answering such questions is to understand and grasp the structural characteristics of terrestrial animals to prevent water evaporation

First of all, the human body does not increase its water.

The water pump is not only excreted from the body through urine.

Also through sweat and tear ducts.

Ginger root is excreted from the body.

Therefore, people should be hydrated every day.

That's how the fallacy of 8 glasses of water a day comes out.

But the human body has ** muscles.

It can ensure that most of the water will not evaporate in the first place.

And humans have also adopted various methods.

For example, put on clothes, hats, and even hold up an umbrella to protect against strong ultraviolet rays and sunlight.

Just like the Arabs tend to wrap themselves tightly in the desert.

These actions can effectively prevent water evaporation.

Although people do not have an exoskeleton, they do, in addition to being able to block bacteria from invading the human body, they can also protect the water in the human body from losing it.

Insects do not have an endoskeleton and have an exoskeleton The exoskeleton is an ossified body shell composed of chitin, and the muscles are born on its inner wall The exoskeleton has soft organs that protect and support the inside; The effect of preventing the evaporation of water in the body The exoskeleton does not grow with the growth of the body after ossification, so there is a phenomenon of shedding the exoskeleton in order to make the body grow during the growth process, which is also called molting, and option A has no effect

So choose A

Most insects live on land, in order to adapt to the dry environment of the land, the surface of the insect's body has a hard exoskeleton, which can play a role in protecting and supporting the soft organs inside, and prevent the evaporation of water in the body, but the exoskeleton can not grow with the growth of the insect's body, so many insects have the phenomenon of shedding the original exoskeleton in the process of growth and development, which is molting

So choose A