Hair, dead skin, saliva, boogers, blood, etc. things from your body
External Respiration takes place in the Trachea. When oxygen and co2 "switch" its where they connect and making this external respiration!
I hope this helps you!
Environmental, agricultural, and natural ecosystems.
Cilia are thin hairlike structures, flagella are long tail like structures, pseudopods are feetlike projections, and pilli are used to hold onto rocks
Number 2, sun increases basically everyday.
