У выхода аорты и легочной артерии из желудочков сердца находятся полулунные клапаны. Они имеют вид кармашков, расположенных на внутренних стенках кровеносных сосудов. При выталкивании крови в аорту и легочную артерию полулунные клапаны прижимаются к стенкам сосудов. При расслаблении желудочков кровь не может вернуться в сердце, так как, затекая в кармашки, она растягивает их и они плотно смыкаются. Таким образом, полулунные клапаны обеспечивают движение крови в одном направлении — из желудочков в артерии.
My flat is beautiful and sunny. It has got five rooms. They are two bathrooms, a kitchen, a bedroom and a living room. The living room is big and cosy. There is a big TV, a sofa and two armchairs in it. My mum and I love sitting there watching TV.
My favourite room is a bedroom. It is smaller than the living room. But it is my favourite place because it is warm and comfortable. There is a bed and two cupboards. My bed is red. It looks like a real car. You can see a computer and a small TV in my bedroom. The room has got an aquarium.There are a lot of exotic fish in it. Every day I feed my fish and my mum helps me to clean my room. I like doing homework and playing in my room.
My flat is beautiful and sunny. It has got five rooms. They are two bathrooms, a kitchen, a bedroom and a living room. The living room is big and cosy. There is a big TV, a sofa and two armchairs in it. My mum and I love sitting there watching TV.
My favourite room is a bedroom. It is smaller than the living room. But it is my favourite place because it is warm and comfortable. There is a bed and two cupboards. My bed is red. It looks like a real car. You can see a computer and a small TV in my bedroom. The room has got an aquarium.There are a lot of exotic fish in it. Every day I feed my fish and my mum helps me to clean my room. I like doing homework and playing in my room.
I like my flat!