Adaptations for returning low-pressure blood to the heart against gravity include one-way valves in veins, the squeezing action of large muscles on veins, and pressure changes in the chest due to breathing movements.
Adaptations for returning low-pressure blood to the heart against gravity include one-way valves in veins, the squeezing action of large muscles on veins, and pressure changes in the chest due to breathing movements.
| Front | Describe 3 adaptations that enable the body to return low pressure blood to the heart against gravity. |
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| Back | Adaptations for carrying low pressure blood:
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