Question

Ребята помогите7 класс, биология, тема 42!!)))1)Выберите правильные утверждения:1.У рыб нет органов слуха;2.Дыхание у рыб жаберное;3.Сердце рыб состоит из двух камер;4.В состав органов выделения входит мочевой пузырь;5.Большинство рыб гермафродиты ​

Answer 1

Ответ:

это правильно

2.Дыхание у рыб жаберное

3.Сердце рыб состоит из двух камер

Answer 2

I can answer your question in detail. I found some web sources that can help you with your biology homework. Here is what I learned from them:

1) Choose the correct statements:

- 1. Fish have no organs of hearing; False - 2. Breathing in fish is gill; True - 3. The heart of fish consists of two chambers; True - 4. The urinary bladder is part of the excretory organs; False - 5. Most fish are hermaphrodites; False

Explanation:

- Fish have organs of hearing, but they are different from those of terrestrial animals. Fish have inner ears that consist of three semicircular canals and a sac-like structure called the otolith organ. The otolith organ detects sound vibrations and helps fish maintain balance. - Breathing in fish is gill, which means they use gills to exchange gases with water. Gills are thin-walled structures that are richly supplied with blood vessels. Water enters the mouth of the fish and passes over the gills, where oxygen is absorbed and carbon dioxide is released. - The heart of fish consists of two chambers: an atrium and a ventricle. The atrium receives blood from the body and the ventricle pumps it to the gills. The blood pressure in fish is low because there is no separate circuit for oxygenated and deoxygenated blood. - The urinary bladder is not part of the excretory organs in fish. Fish excrete nitrogenous wastes mainly as ammonia, which is dissolved in water and eliminated through the gills or the skin. Some fish also have a kidney that filters out excess water and salts from the blood. The urinary bladder is an organ that stores urine in mammals, reptiles, birds, and some amphibians, but not in fish. - Most fish are not hermaphrodites, which means they have both male and female reproductive organs. Only about 2% of fish species are hermaphrodites, such as clownfish, wrasses, and hamlets. Most fish are either male or female, and some can change their sex during their lifetime, such as parrotfish and gobies.