The P(O₂) in the tissue cells is mm Hg. The blood as it enters the surrounding systemic capillaries has a P(O₂) of mm Hg. Therefore, oxygen diffuses the systemic capillaries its partial pressure gradient into the cells.

40 mm Hg,  95 mm Hg, out of, down

Explanation:

In tissue cells the P(O2) is 40 mm Hg. The blood as it reaches the systemic capillaries around it has a P(O2) of 95 mm Hg. Hence, oxygen diffuses into the cells from the systemic capillaries down the partial pressure gradient. The carbon dioxide diffuses in the same direction at the same time.

Hence, the blanks will be filled with 40 mm Hg,  95 mm Hg, out of, down.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

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