At 1) At what point is the amount of oxygen at its highest? in


Question Description:

25

At 1) At what point is the amount of oxygen at its highest? in the capillaries during strenous activity in the lungs in the capillaries at rest in muscle tissue during strenous activity Why are insects limited to relatively small sizes? Their respiratory system relies on diffusion which is slow over long distances Their respiratory muscles are smooth muscle only They have a closed circulatory system Their exoskeleton cannot support larger-bodied animals 4) Air rushes into the lungs of humans during inhalation because the volume of the thoracic cavity increases pressure in the alveoli increases the diaphragm contracts and pushes upward on the chest cavity smooth muscle lining the trachea and bronchi contracts and causes their volume to increase

Answer

25