Answer:
Circulatory system is an organ system which is composed of the heart and blood vessels. Blood vessels consists of arteries, veins, and capillaries.
Explanation: Heart is the pumping organ which pumps oxygenated blood to all cells of the body and bring back deoxygenated blood from all the cells.
Blood vessels consists of arteries, veins and capillaries. Arteries are the vessel which carry oxygenated blood. Veins are the vessel which carry deoxygenated blood and capillaries are the tiny vessel which are connected to the every cell from arteries and Veins.
Bacteria are the simplest single cells that carry out all basic life activities.
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Answer:
It's going to be:
A-Endospores can survive extreme heat, lack of water, radiation, and exposure to many toxic chemicals.
C-Endospores are highly durable dehydrated cells with thick cell walls.
ANSWER IS A and C
B the bird could fly into the fan
