Explanation:
Oxygen and nutrients from food must be absorbed into the bloodstream to be delivered to cells for respiration. Waste materials such as carbon dioxide must be removed from cells into the bloodstream. Tissues contain capillary networks to allow these exchanges to occur at a cellular level.
Answer:
The costal cartilage connects the ribs to the sternum. Costal cartilage normally allows forward movement of the ribs, providing flexibility to the chest wall. There are usually 12 pairs of cartilage associated with the rib cage.
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Answer:
Diffusion
Explanation:
Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the alveoli and the capillaries in the lungs.
Answer: What is the order of steps in the scientific method?
The scientific method has five basic steps, plus one feedback step:
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
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Proton is positive.(+)
Neutron is neutral(0)
Electron is negative(-)
