<span>Unidirectional flow in the heart is ensured because the heart contains valves that prevent backflow.
These valves keep the flow of the heart going in one direction (hence the name "unidirectional").</span>
Answer:
Central Nervous System, Peripheral Nervous System, Afferent, Efferent, Somatic, Visceral, Sensory Division, Motor Division, Sensory, Motor, Body, Organs within the ventral body cavity
Explanation:
There are many, many answers to this question. You can find the one you need above. Hope it helps!
Biological Classification.
The classification system starts with a group with a wide variety of organisms and becoming more selective as the groups get more specific.
Additional information: Carl Linnaeus classified organisms by shared characteristics.
In order of importance, the world's four most important crop species are: CORN, WHEAT, RICE AND POTATOES.
Corn is the most produced grain in the world and it is used as raw material for production of different types of food. Wheat is the leading source of vegetable protein in the world, it is usually grown in dry and cold climates.
No, because DNA is a natural fact of a humans body.
