Question

Какие утверждения верны? !!!!!!!!!!!!СРОЧНО!!!!!!!1 Кровеносная система у позвоночных животных замкнутая и состоит из сердца и кровеносных сосудов2 Кровь у всех животных переносит только кислород3 У рыб трёхкамерное сердце4 Артериальная кровь насыщена кислородом 5 У дождевого червя замкнутая кровеносная система6 Кровь состоит из плазмы и клеток крови7 У всех многоклеточных животных кровь красная

Answer 1

Правильные ответы таковы : 1,4,5,6

Answer 2

Statement 1: Кровеносная система у позвоночных животных замкнутая и состоит из сердца и кровеносных сосудов.

This statement is true. The circulatory system in vertebrate animals is closed, meaning that the blood is contained within a network of blood vessels. The system consists of the heart, which pumps the blood, and the blood vessels, which transport the blood throughout the body.

Statement 2: Кровь у всех животных переносит только кислород.

This statement is false. While oxygen is an important component of blood, it is not the only substance transported by blood. Blood also carries nutrients, hormones, waste products, and immune cells throughout the body. Additionally, blood plays a role in regulating body temperature and maintaining homeostasis.

Statement 3: У рыб трёхкамерное сердце.

This statement is generally true. Most fish have a three-chambered heart, consisting of two atria and one ventricle. However, it is important to note that there are exceptions to this rule. Some fish species have a two-chambered heart, while others have a four-chambered heart.

Statement 4: Артериальная кровь насыщена кислородом.

This statement is true. Arterial blood carries oxygen-rich blood away from the heart to the tissues and organs of the body. Oxygen is transported by red blood cells, which bind to oxygen in the lungs and release it to the tissues. Arterial blood is typically bright red in color due to the oxygen it carries.

Statement 5: У дождевого червя замкнутая кровеносная система.

This statement is true. Earthworms, including the common earthworm or "дождевой червь," have a closed circulatory system. Their circulatory system consists of blood vessels that carry blood throughout the body. The blood is contained within the vessels and does not directly come into contact with body tissues.

Statement 6: Кровь состоит из плазмы и клеток крови.

This statement is true. Blood is composed of plasma, which is a yellowish liquid that makes up about 55% of blood volume, and blood cells, which include red blood cells, white blood cells, and platelets. The plasma carries nutrients, hormones, and waste products, while the blood cells have various functions, such as oxygen transport, immune response, and blood clotting.

Statement 7: У всех многоклеточных животных кровь красная.

This statement is generally true. In most multicellular animals, including vertebrates, the oxygen-carrying pigment in red blood cells is called hemoglobin, which gives blood its red color. However, it is important to note that there are exceptions to this rule. Some animals have different pigments in their blood, resulting in different colors. For example, certain marine worms have green blood due to the presence of a different oxygen-carrying pigment called chlorocruorin.