They breathe through their skin. Air dissolves on the mucus of their skin, so they MUST stay moist to breathe.
If worms dry out, they suffocate. As fresh air is taken in through the skin, oxygen is drawn into the worm's circulatory system, and the worm's hearts pump the oxygenated blood to the head area.
The Unit 'Understanding organisms' is not found here, but an organism is a biological system composed of cells.
<h3>What is an organism?</h3>
An organism is a living entity that is defined by the presence of cells, which are the basic structural unit of life.
Organisms have the ability to respond to external stimuli, perform metabolic activities and exhibit a internal state of equilibrium (homeostasis).
Organisms can be composed of single cells (e.g., bacteria, protists) or many cells (e.g., plants and animals).
In conclusion, the Unit 'Understanding organisms' is not found here, but an organism is a biological system composed of cells.
Learn more on the organisms here:
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Answer:
Because if the 4-year-old child passes out from holding his breath, he will immediately begin breathing again, keeping him alive.
Answer:
1. The Heartlies in the front and middle of your chest, behind and slightly to the left of your breastbone.
2. Right Atrium, Left Atrium, Right Ventricle, Left Ventricle
3. The valves prevent the backward flow of blood.
4. Arteries carry oxygenated blood while veins carry deoxygenated blood.
5. Eat Healthy, Stay Active
Explanation:
PLZ MARK AS THE BRAINLIEST
HAVE A GOOD DAY
: )
Please rephrase the question, it doesn't make sense.
