Nope!!! Some do but not all. All animals do though. Plants that do are called vasculer. Those that don't are invascular. Moss, algea, and others are invascular.
yes.
For some it is open while for others, it is closed.
Because we are too big for all the cells in our body to be oxygenated and fed by simple diffusion form the environment so the circualtor system supples all the cells with what they need.
I think so but I am unsure
Yes.
yes
All bird species have different circulatory systems, for the most part the smaller species have an open system, while larger birds have a closed system.
no, a university proffessor would say that a rat is not included in the animals that have circulatory systems at all and they sometimes go 69 with the same sex rats
Tigers are mammals and so their circulatory system is very similar to that of humans.
a closed one
Their circulartion system is very similar to humans (closed circulatory system)
All bird species have different circulatory systems, for the most part the smaller species have an open system, while larger birds have a closed system.
squids have closed closed circulatory systems
closed circulatory system
Some dont have any at all but most have closed cirrculatory systems.
open circulatory systems
closed. Open circulatory systems are common in athropods, such as scorpions and insects, but not of mammals. They are when the body lacks blood vessels but has blood throughout the entire cavity of the body. Mammals have closed circulatory systems, as they contain blood vessels.
yes
Fish have closed-loop circulatory systems.
They have closed circulatory systems.
open circulatory systems have sinuses and only have blood vessels
A humans circulatory system is closed. Large creatures tend to have a closed system, while smaller creatures like insects and crustaceans have open circulatory systems. Closed is when there are vessels and the blood stays there. Open is when blood floats around the body. Hope it helps:)
not all open circulatory systems transport oxygen. Insects have no oxygen in their blood