2 Describe the relationship between body mass and total surface area of the air sacs.

Explanation: The body mass is a weight of the person. The total surface area of the air sacs means that in an organism who is having air sacs, spaces are present in them In these air sacs there is a presence of air which is constant.

Explanation:

The relationships between the ratios of Hemoglobin total surface area of such conditions result from the available amount of air sacs that permits.

Birds of 21 species with body mass ranging from 8 to 170 g, in eight species of antiracial.

Air sacs are present as small sacs off the bigger respiration tubes (tracheae) of insects, as prolongation of the lungs in birds, and as final organs in the lungs of certain other vertebrates.

They give to increase respiratory efficiency by giving a huge superficial area for gas transportation.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.