1. The ureters, two thin muscular tubules, carry the urea from kidneys to urinary bladder by (peristalsis - самотёком). 2. Saliva is the fluid formed by the (kidneys - не почками) that carries metabolic wastes to the body 3. The kidneys receive blood from the (pulmonary - не от легочных) vein, left and right 4. The ureter is a tubular structure that carries the urine from the (gallbladder - не желчный, а мочевой пузырь) to the outside 5. The urinary bladder is a permanent storage reservoir for urine located in the (thoracic - не в грудной клетке, а в брюшной полости) cavity.
Belka and Strelka were most usual dogs of the Soviet Union.But they have become famous all over the world.These two dogs together flew into space and did a couple of turns around the Earth's orbit.This happened even before the first space flight of people before Yuri Gagarin. Scientists wanted to see how the animals feel before you send people into space first.Belka and Strelka planted inside and launched a satellite into orbit.The flight was difficult and dangerous, because then scientists have not really know what is happening and how a living organism in orbit.But dogs are well behaved and obedient, only barked loudly, seeing the Earth through the porthole. Belka and Strelka were flying in space more than a day, and then landed safely.They rejoiced worldwide.
