Endocytosis is an energy-using process. The answer is A.
The epidermis is the outermost layer of skin and is app. .005-1.5mm thick. it is made up of several different types of cells with keratinocutes being the most abundant.
The dermis is the second layer of skin and is app. .3-3.0mm thick. And basically consists of connective tissue.
Gram staining
Gram-positive turns pink or red
Gram negative turns dark blue or purple
Explanation:
Oxygen does not enter the body except due to some diseases and loss of consciousness, and then the patient uses a ready-made ventilator
(viewpoint)
Answer:
in the Air sacs
Explanation:
the air sacs has a million tiny holes and that is probably where oxygen transfers