Question

6. Explain the differences.
a. Arteries and veins.
b. External and internal respiration.

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Answer 1

Explanation:

External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Internal Respiration: Oxygen diffuses out from the blood into tissue during internal respiration. External Respiration: Oxygen diffuses from alveolar air into the blood during external respiration. sorry answer (b) only I know..hope this may help.

Answer 2

Answer for (a):

Arteries:

    i. They have thick walls.

    ii. They carry only oxygenated blood (with pulmonary artery as an exception).

    iii. They carry blood away from the heart.

    iv. The blood in them flows with high pressure and are flexible.

Veins:

    i. They have thin walls with valves.

    ii. They carry only de-oxygenated blood (with pulmonary vein as an exception).

    iii. They carry blood toward the heart.

    iv. The blood in them flows with less pressure and are not very flexible.

Answer for (b):

External Respiration:

    i. It is a physical process also known as breathing.

    ii. Includes Inhalation and Exhalation.

    iii. Oxygen in blood is replenished by this process.

Internal Respiration:

    i. It is a chemical process

    ii. Involves the lysis of glucose

    iii. Oxygen is used by this process and removes oxygen in the blood.