Question

Как циркулирует кровь в организме ланцетника? ​

Answer 1

Ответ:

Передний конец тела снабжается кровью двумя короткими веточками парных корней спинной аорты (aorta dorsalis) — сонными артериями. По ответвляющимся от дорсальной аорты артериям кровь поступает во все части тела. Так представлена артериальная система кровообращения ланцетников.

Answer 2

Ответ:

Кровеносная система ланцетника замкнутая. По спинному сосуду от жабр к внутренним органам течёт насыщенная кислородом артериальная кровь. От внутренних органов по брюшному сосуду к жабрам поступает кровь венозная, насыщенная углекислым газом. Таким образом, у ланцетника один круг кровообращения. Движение крови обеспечивается сокращением нескольких кровеносных сосудов.

Answer 3

Circulation of Blood in the Lancelet

The circulation of blood in the lancelet, also known as amphioxus, is a fascinating process that involves several key steps.

1. Heart Structure and Function: The lancelet has a simple circulatory system with a two-chambered heart that pumps blood through the body. The heart consists of an atrium and a ventricle, and the blood flows in one direction through the circulatory system.

2. Blood Flow: The blood in the lancelet circulates in a closed circulatory system, meaning it flows through vessels and does not directly bathe the tissues. The blood is pumped from the heart to the gills, where it is oxygenated, and then it flows to the rest of the body before returning to the heart.

3. Oxygenation Process: In the gills, the blood undergoes oxygenation, where it picks up oxygen and releases carbon dioxide. This oxygenated blood is then distributed to the rest of the body, providing oxygen to the tissues and organs.

4. Nutrient and Waste Exchange: As the oxygenated blood travels through the body, it delivers nutrients and collects waste products from the cells. This exchange of nutrients and waste is essential for the proper functioning of the lancelet's body.

5. Return to the Heart: After delivering oxygen and nutrients to the body's tissues, the deoxygenated blood returns to the heart to be pumped to the gills for oxygenation once again, completing the circulation cycle.

In summary, the circulation of blood in the lancelet involves the pumping of blood by a two-chambered heart, oxygenation of the blood in the gills, distribution of oxygenated blood to the body, exchange of nutrients and waste, and the return of deoxygenated blood to the heart for the cycle to begin again.

If you have further questions or need more details about any specific aspect of the lancelet's blood circulation, feel free to ask!